Cook the pasta according to package directions. Before you drain it, reserve 1 cup of the cooking pasta water for later.
Drain the pasta and keep the pasta in the strainer while you return the empty pot to the stovetop.
Add the olive oil and the garlic to the pot, and saute, stirring frequently, for 30 seconds, until the garlic is fragrant.
Add in the ricotta cheese, parmesan cheese, and lemon zest and juice. Stir together to create a consistent sauce. Thin out the sauce with half of the reserved pasta water.
Add the cooked pasta back to the pan and toss with the pasta sauce to evenly coat the pasta. Season with salt and pepper to taste (I start with ½ teaspoon of each). If needed or desired, you can add a little more pasta water at a time, stirring after each addition, to reach the desired consistency of pasta sauce that you want.
Serve immediately. Top with sliced basil leaves and additional lemon zest and parmesan cheese.