In a large pot of boiling salted water, cook pasta according to package directions until al dente. Meanwhile, make the ricotta sauce.
In a medium bowl, combine ricotta, olive oil, Parmesan cheese, garlic, lemon zest, and juice. Season with 1/4 tsp of salt and a good pinch of pepper. Stir until well combined, taste, and make sure you’re happy with the seasoning.
In the last minute of the pasta’s cooking time, reserve 1/2 cup of the cooking water, then add spinach to the pot. Stir well and push the leaves down to submerge them in water.
After 1 minute, drain and return pasta and spinach to the same pot.
Add the ricotta sauce and part of the reserved cooking water. Stir well to evenly coat the pasta in the sauce, add more cooking water as needed for a smooth and creamy texture.
Serve immediately and garnish with grated or shaved Parmesan cheese, a drizzle of extra virgin olive oil, and lemon wedges if desired. Enjoy!