Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil.
2. Add the pasta and cook according to the package instructions until al dente.
3. Before draining, reserve 1/2 cup of the pasta water, then drain the pasta and set it aside.

Step 2: Prepare the Ricotta Mixture

1. In a large mixing bowl, combine the ricotta cheese, Parmesan cheese, lemon zest, lemon juice, salt, and black pepper.
2. Whisk everything together until smooth and well combined.

Step 3: Sauté Garlic

1. Heat the olive oil in a large skillet over medium heat.
2. Add the minced garlic and cook for about 30 seconds until fragrant, stirring constantly to prevent burning.

Step 4: Combine Pasta and Ricotta Sauce

1. Reduce the heat to low and add the drained pasta to the skillet with the garlic.
2. Pour the ricotta mixture over the pasta.
3. Gradually add the reserved pasta water, a little at a time, stirring continuously until a creamy sauce forms and coats the pasta evenly.

Step 5: Final Touches

1. Stir in the butter (if using) to enhance creaminess.
2. Sprinkle with red pepper flakes for a bit of heat (optional).
3. Garnish with freshly chopped basil or parsley.
4. Serve immediately with extra Parmesan on top.