Prepare Pasta: Bring a large pot of salted water to a boil. Add pasta and cook according to package instructions, usually 8-10 minutes, until al dente. Reserve a cup of pasta water, then drain and set aside.

Create Creamy Sauce: In a skillet over medium heat, combine ricotta and lemon juice, stirring until smooth. Add a splash of reserved pasta water and cook for 2-3 minutes.

Incorporate Arugula: Add arugula to the skillet, folding it into the sauce. Cook for another 1-2 minutes until it slightly wilts.

Combine Pasta and Sauce: Toss the drained pasta with the sauce in the skillet, adding more reserved pasta water if needed.

Serve: Plate pasta and garnish with lemon zest and optional Parmesan cheese.