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Pour the two cans of whole peeled tomatoes into a large, heavy-bottomed pot. Add the 1 1/2 sticks of unsalted butter and the two peeled and halved yellow onions to the pot with the tomatoes.

Bring the sauce mixture to a gentle simmer over medium heat. Once simmering, reduce the heat to low and cook uncovered for approximately 1 hour and 15 minutes, allowing the sauce to gently bubble and the flavors to meld. Stir occasionally to prevent sticking.

Once the sauce has simmered, carefully remove the cooked onion halves from the pot using tongs and discard them (or save for another use).

If you prefer a smoother sauce, use an immersion blender to briefly blend the sauce to your desired consistency. Alternatively, you can leave it chunky, as is traditional.

While the sauce is finishing, bring a large pot of water to a rolling boil. Add 1 tablespoon of kosher salt to the boiling water, then add the pasta and cook according to package directions until al dente.

Before draining the pasta, reserve about 1/4 cup of the starchy pasta cooking water. Then, using tongs, transfer the cooked pasta directly from the pot into the pot with the tomato sauce.

Add 1/2 cup of freshly grated Parmesan cheese to the pasta and sauce. Pour in the reserved 1/4 cup of pasta cooking water. Toss everything together thoroughly until the pasta is well coated and the sauce is emulsified.

Taste and adjust seasoning with additional salt if needed. Serve immediately, garnished with extra grated Parmesan cheese.


Pour the two cans of whole peeled tomatoes into a large, heavy-bottomed pot. Add the 1 1/2 sticks of unsalted butter and the two peeled and halved yellow onions to the pot with the tomatoes.

Bring the sauce mixture to a gentle simmer over medium heat. Once simmering, reduce the heat to low and cook uncovered for approximately 1 hour and 15 minutes, allowing the sauce to gently bubble and the flavors to meld. Stir occasionally to prevent sticking.

Once the sauce has simmered, carefully remove the cooked onion halves from the pot using tongs and discard them (or save for another use).

If you prefer a smoother sauce, use an immersion blender to briefly blend the sauce to your desired consistency. Alternatively, you can leave it chunky, as is traditional.

While the sauce is finishing, bring a large pot of water to a rolling boil. Add 1 tablespoon of kosher salt to the boiling water, then add the pasta and cook according to package directions until al dente.

Before draining the pasta, reserve about 1/4 cup of the starchy pasta cooking water. Then, using tongs, transfer the cooked pasta directly from the pot into the pot with the tomato sauce.

Add 1/2 cup of freshly grated Parmesan cheese to the pasta and sauce. Pour in the reserved 1/4 cup of pasta cooking water. Toss everything together thoroughly until the pasta is well coated and the sauce is emulsified.

Taste and adjust seasoning with additional salt if needed. Serve immediately, garnished with extra grated Parmesan cheese.
