Tomato Meat Sauce Pasta
Onsen Egg

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Elevate your homemade pasta with this rich, slow-simmered tomato and minced meat sauce. Topped with a perfectly runny onsen egg, it rivals any Western restaurant.

↓ The ingredients ↓ The steps

While spaghetti with meat sauce is a beloved comfort food worldwide, adding a soft-boiled onsen egg introduces a luxurious, creamy dimension to the dish. The combination of pork and beef yields a perfectly balanced, savory base that soaks beautifully into the noodles. Simmering the sauce patiently allows the natural sweetness of the tomatoes and mirepoix to shine.

A beautiful serving of tomato meat sauce pasta topped with a runny onsen egg and fresh parsley.
A beautiful serving of tomato meat sauce pasta topped with a runny onsen egg and fresh parsley.
Prep15 mins
Cook45 mins
Total1 hr
Yield4 servings
DifficultyMedium
Calories650 kcal

Ingredients

Instructions

  1. 1Chop the celery
    Hands using a large knife to chop green celery on a round wooden cutting board.

    Wash the celery thoroughly and chop it finely on a cutting board. Leaving some texture instead of making it a complete paste will add a nice crunch to the final meat sauce.

    Tip: Using a food processor is an option to save time, but hand-chopping ensures a better texture.
  2. 2Dice the carrots
    Hands dicing bright orange carrots finely on a wooden cutting board with a knife.

    Peel the carrots and dice them finely to match the size of the celery. Keeping the vegetable pieces uniform helps them cook evenly and meld perfectly into the meat sauce.

    Tip: Carrots add a natural sweetness to the sauce which perfectly balances the acidity of the tomatoes.
  3. 3Dice the red onion
    Hands chopping a red onion into small pieces on a wooden cutting board.

    Finely dice the red onion. This combination of celery, carrots, and onions creates the flavor foundation for a classic and aromatic tomato meat sauce.

    Tip: Use a sharp knife to dice the onion cleanly; this reduces the amount of tear-inducing gas released.
  4. 4Brown the meat
    Minced pork and beef browning in a white pot over medium-high heat.

    Add the minced pork and beef into the heated pot with oil. Fry the mixture, stirring occasionally, until the moisture evaporates and the meat is well-browned and fragrant.

    Tip: Ensure the pan is hot before adding the meat to get a good sear and develop deeper flavor.
  5. 5Stir-fry the meat mixture
    Stir-frying a mixture of minced pork and beef in a pot using a black spatula.

    Stir-fry the meat continuously with a spatula to break up any clumps, cooking until the moisture evaporates and the meat is nicely browned.

    Tip: A mixture of pork and beef provides the best balance of flavor and richness for a meat sauce.
  6. 6Add the minced garlic
    A pile of fresh minced garlic added over browned minced meat in a white pot.

    Once the meat is browned, add the finely minced garlic into the pot. Continue to stir-fry everything together to release the aromatic oils of the garlic into the meat mixture.

    Tip: Wait until the meat is fully browned before adding garlic to prevent the garlic from burning and turning bitter.
  7. 7Add tomatoes
    Fresh diced tomatoes being added to the cooked meat mixture in the pot.

    Add the peeled and diced fresh tomatoes to the browned meat. Stir them in to begin incorporating their juices into the sauce.

    Tip: Peeling the tomatoes beforehand results in a smoother, more refined sauce texture.
  8. 8Add aromatic vegetables
    Chopped carrots, celery, and onions being added to the meat and tomato mixture.

    Add the finely chopped celery, carrots, and onions to the pot. Stir-fry the mixture thoroughly until the vegetables soften and release their moisture.

    Tip: Keeping a little bit of texture in the chopped vegetables adds a nice bite to the finished sauce.
  9. 9Sauté the mixture
    A colorful mix of meat, carrots, celery, and onions being stirred in the cooking pot.

    Continue stirring the meat and vegetables over the heat. Ensure they are well-combined and cooking evenly so the flavors meld together.

    Tip: Cook until the vegetables are tender to ensure they integrate perfectly into the meat sauce.
  10. 10Season the sauce
    Salt being sprinkled over the browning meat and vegetable mixture in the pot.

    Season the mixture by sprinkling salt evenly over the top. This helps to draw out the remaining moisture and enhances the overall flavor of the sauce base.

    Tip: Seasoning in stages helps you balance the flavors more effectively as you cook.
  11. 11Add ketchup
    Ketchup being added to the meat sauce in the pot, with visible black pepper already mixed in.

    Squeeze the ketchup into the sauce. This provides a balanced sweet and tangy base that is essential for a classic meat sauce.

    Tip: Adding ketchup helps provide a rich color and depth to the sauce flavor profile.
  12. 12Mix the ingredients thoroughly
    Spatula mixing diced tomatoes and finely chopped vegetables into browned minced meat in a white pot.

    Thoroughly mix the meat and vegetables using a spatula. Stir-fry everything together to combine the flavors and allow the vegetables to cook down, creating a uniform, rich base for the sauce.

    Tip: Ensure you stir-fry until the vegetables soften and integrate well with the meat for a uniform sauce texture.
  13. 13Add water and bay leaves
    Clear water being poured from a small glass bowl into a pot containing tomato-meat sauce and bay leaves.

    After adding the ketchup and seasonings, nestle two bay leaves into the mixture and pour a bowl of clear water into the pot. This creates the necessary liquid base for the sauce to simmer.

    Tip: Use hot water if you want to keep the cooking temperature consistent, though room temperature is also fine.
  14. 14Cover and simmer
    A lid being placed on a white pot sitting on a stove, with the sauce simmering inside.

    Cover the pot with its lid and reduce the heat to low. Let the sauce simmer gently for about thirty minutes, allowing the flavors to meld and the sauce to thicken into a rich, aromatic consistency.

    Tip: Simmering on low heat prevents the sauce from burning at the bottom and ensures the meat stays tender.
  15. 15Prepare pasta water
    Oil being poured from a small metal measuring cup into a pot of boiling water.

    Bring a separate pot of water to a boil for the pasta. Add a little oil and salt to the boiling water, which helps flavor the pasta and prevents the strands from sticking together during the cooking process.

    Tip: Adding oil to the water is a great trick to keep the pasta strands separated while they cook.
  16. 16Cook the pasta
    A bunch of dry spaghetti being dropped into a pot of boiling water.

    Carefully add the dry spaghetti noodles into the pot of boiling, seasoned water. Cook on medium-low heat for eight to ten minutes, or until the pasta reaches your desired level of tenderness.

    Tip: Check the pasta a minute or two before the recommended time to ensure it cooks to a perfect al dente texture.
  17. 17Stir the pasta
    Metal tongs being used to stir and submerge cooking spaghetti in a pot of water.

    Use a pair of metal tongs to gently submerge the softening noodles into the boiling water and stir them occasionally. This ensures the pasta cooks evenly and does not clump together.

    Tip: Stirring during the first minute of cooking is especially important to ensure every strand gets coated with water.
  18. 18Rinse the cooked pasta
    Cooked spaghetti being transferred with tongs from a boiling pot into a glass bowl of cold water.

    Once the spaghetti is cooked, remove it from the boiling water and transfer it directly into a bowl filled with cold water. Rinsing the pasta in cold water stops the cooking process immediately, yielding a chewier and firmer texture.

    Tip: Dont soak the pasta for too long; a quick rinse is sufficient before mixing it with the sauce.
  19. 19Check the meat sauce
    A deeply colored, thick tomato meat sauce simmering in a pot, being stirred with a wooden spoon.

    After simmering for thirty minutes, check on the tomato meat sauce. It should be deeply colored, thick, and incredibly fragrant with a rich sweet and sour flavor profile. Give it a good stir to ensure an even consistency.

    Tip: You can make extra batches of this meat sauce. It stores beautifully in the fridge for three to five days or can be frozen for up to a month.
  20. 20Combine pasta and sauce
    Tongs placing cooked spaghetti into a black frying pan that holds a portion of heated tomato meat sauce.

    Heat a portion of the prepared meat sauce in a frying pan. Using tongs, take a serving of the cold-rinsed spaghetti and place it directly into the heated sauce to begin mixing them together.

    Tip: If the sauce feels a little too thick, add a small splash of hot pasta water to help it loosen and coat the noodles perfectly.
  21. 21Toss to coat evenly
    Spaghetti and meat sauce being tossed together in a frying pan using wooden chopsticks to evenly coat the noodles.

    Using wooden chopsticks or tongs, thoroughly toss the spaghetti and meat sauce together in the pan. Keep tossing until every strand of pasta is completely coated and warmed through with the savory sauce.

    Tip: For the ultimate Western restaurant experience at home, serve this plated with a runny onsen egg, a sprinkle of fresh chopped parsley, and black pepper.

Storage & Reheating

Refrigerator
3-5 days
Store the meat sauce and cooked pasta in separate airtight containers to prevent the noodles from becoming mushy.
Freezer
Up to 1 month
Freeze the meat sauce only. Cook fresh pasta when you are ready to serve.
Reheating
5-10 min
Reheat the meat sauce gently on the stovetop over low heat. Toss with freshly cooked or reheated pasta.

Burn It Off

Running
~65 minutes at an easy jog (~9 km/h).
Leisurely Cycling
~1 hour 45 minutes of relaxed pedaling (~14 km/h).
House Cleaning
~2 hours 35 minutes of steady household chores.

Frequently Asked Questions

Rinsing stops the cooking process immediately and washes off excess surface starch. This results in a firmer, chewier texture that holds up beautifully when tossed in the hot pan with the meat sauce.
Yes, but a 50/50 blend is highly recommended. Beef provides a deep, robust flavor, while the pork adds necessary richness, fat, and a tender mouthfeel.
An authentic onsen egg is cooked in its shell in roughly 65°C (150°F) water for 30-45 minutes. For a simpler home hack, you can softly boil an egg for exactly 6 minutes, then plunge it into an ice bath.
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