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Bring a large pot of generously salted water to a rolling boil. Add the spaghetti and cook according to package directions until al dente. Reserve 1 1/2 cups of the pasta cooking water before draining the pasta.

While the pasta cooks, prepare the sauce. In a large skillet or Dutch oven, melt the butter over medium heat. Add the minced garlic and red pepper flakes (if using) and sauté for 1 minute until fragrant, being careful not to burn the garlic.

Remove the skillet from the heat. Stir in the lemon zest and lemon juice. Add the ricotta cheese, 1 cup of the reserved pasta water, 1/2 cup of grated Parmesan cheese, 1 teaspoon of kosher salt, and 1/2 teaspoon of black pepper. Whisk until the sauce is smooth and creamy.

Add the drained spaghetti to the skillet with the sauce. Toss well to coat the pasta evenly. If the sauce is too thick, add more reserved pasta water, 1/4 cup at a time, until it reaches your desired consistency.

Serve immediately, garnished with fresh chopped parsley and additional grated Parmesan cheese, if desired.


Bring a large pot of generously salted water to a rolling boil. Add the spaghetti and cook according to package directions until al dente. Reserve 1 1/2 cups of the pasta cooking water before draining the pasta.

While the pasta cooks, prepare the sauce. In a large skillet or Dutch oven, melt the butter over medium heat. Add the minced garlic and red pepper flakes (if using) and sauté for 1 minute until fragrant, being careful not to burn the garlic.

Remove the skillet from the heat. Stir in the lemon zest and lemon juice. Add the ricotta cheese, 1 cup of the reserved pasta water, 1/2 cup of grated Parmesan cheese, 1 teaspoon of kosher salt, and 1/2 teaspoon of black pepper. Whisk until the sauce is smooth and creamy.

Add the drained spaghetti to the skillet with the sauce. Toss well to coat the pasta evenly. If the sauce is too thick, add more reserved pasta water, 1/4 cup at a time, until it reaches your desired consistency.

Serve immediately, garnished with fresh chopped parsley and additional grated Parmesan cheese, if desired.
