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Bring a large pot of generously salted water to a rolling boil. Add the rigatoni pasta and cook according to package directions until al dente. Before draining, reserve 1/2 cup of the starchy pasta water. Drain the pasta and set aside.

While the pasta cooks, heat the olive oil in a large skillet or Dutch oven over medium heat. Add the chopped yellow onion and sauté for 3-4 minutes until softened and translucent.

Add the minced garlic, crushed red pepper flakes, and 1/2 teaspoon of salt to the skillet. Cook for 1 minute until fragrant, being careful not to burn the garlic.

Stir in the tomato paste. Cook, stirring frequently, for 5-7 minutes, allowing the tomato paste to caramelize and deepen in color. This step is crucial for developing a rich, sweet flavor in the sauce. You'll notice a deep, sweet aroma when it's ready.

Once the tomato paste is caramelized, stir in the lime juice, dried basil, dried oregano, and black pepper. Pour in the heavy cream and the reserved 1/2 cup of pasta water. Bring the sauce to a gentle simmer, stirring until well combined and slightly thickened.

Add the cooked rigatoni pasta to the skillet with the sauce. Toss gently to coat all the pasta evenly. Stir in the 1/2 cup of grated Parmesan cheese and the chopped fresh parsley. Continue to toss until the cheese is melted and the sauce clings beautifully to the pasta.

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


Bring a large pot of generously salted water to a rolling boil. Add the rigatoni pasta and cook according to package directions until al dente. Before draining, reserve 1/2 cup of the starchy pasta water. Drain the pasta and set aside.

While the pasta cooks, heat the olive oil in a large skillet or Dutch oven over medium heat. Add the chopped yellow onion and sauté for 3-4 minutes until softened and translucent.

Add the minced garlic, crushed red pepper flakes, and 1/2 teaspoon of salt to the skillet. Cook for 1 minute until fragrant, being careful not to burn the garlic.

Stir in the tomato paste. Cook, stirring frequently, for 5-7 minutes, allowing the tomato paste to caramelize and deepen in color. This step is crucial for developing a rich, sweet flavor in the sauce. You'll notice a deep, sweet aroma when it's ready.

Once the tomato paste is caramelized, stir in the lime juice, dried basil, dried oregano, and black pepper. Pour in the heavy cream and the reserved 1/2 cup of pasta water. Bring the sauce to a gentle simmer, stirring until well combined and slightly thickened.

Add the cooked rigatoni pasta to the skillet with the sauce. Toss gently to coat all the pasta evenly. Stir in the 1/2 cup of grated Parmesan cheese and the chopped fresh parsley. Continue to toss until the cheese is melted and the sauce clings beautifully to the pasta.

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