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Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Reserve 1 cup of pasta water before draining the pasta.

While the pasta is cooking, heat the olive oil in a large skillet or Dutch oven over medium heat. Add the diced yellow onion and cook until softened and translucent, about 5-7 minutes.

Add the minced garlic, dried oregano, and red pepper flakes (if using) to the skillet. Cook for 1 minute more until fragrant, being careful not to burn the garlic.

Pour in the can of diced tomatoes (undrained). Bring the sauce to a simmer, then reduce the heat to low, cover, and let it cook for 10 minutes to allow the flavors to meld.

Stir in the heavy cream and grated Parmesan cheese. Mix well until the cheese is melted and the sauce is creamy. Season with salt and black pepper to taste.

Add the fresh spinach to the sauce, a handful at a time if necessary, and stir until it wilts completely, which should only take 1-2 minutes.

Add the drained pasta to the skillet with the sauce. Toss to coat the pasta evenly. If the sauce is too thick, add a splash or two of the reserved pasta water until it reaches your desired consistency.

Serve immediately, garnished with fresh chopped basil and extra grated Parmesan cheese, if desired.


Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Reserve 1 cup of pasta water before draining the pasta.

While the pasta is cooking, heat the olive oil in a large skillet or Dutch oven over medium heat. Add the diced yellow onion and cook until softened and translucent, about 5-7 minutes.

Add the minced garlic, dried oregano, and red pepper flakes (if using) to the skillet. Cook for 1 minute more until fragrant, being careful not to burn the garlic.

Pour in the can of diced tomatoes (undrained). Bring the sauce to a simmer, then reduce the heat to low, cover, and let it cook for 10 minutes to allow the flavors to meld.

Stir in the heavy cream and grated Parmesan cheese. Mix well until the cheese is melted and the sauce is creamy. Season with salt and black pepper to taste.

Add the fresh spinach to the sauce, a handful at a time if necessary, and stir until it wilts completely, which should only take 1-2 minutes.

Add the drained pasta to the skillet with the sauce. Toss to coat the pasta evenly. If the sauce is too thick, add a splash or two of the reserved pasta water until it reaches your desired consistency.

Serve immediately, garnished with fresh chopped basil and extra grated Parmesan cheese, if desired.
