Bring a large pot of salted water to a boil. Add the tortellini and cook according to package instructions until al dente, then drain and set aside.
Heat the olive oil in a skillet over medium heat. Once shimmering, add the minced garlic and cook until fragrant, about 30 seconds to 1 minute, until garlic is golden but not burnt.
12 ounces tortellini (fresh or frozen)
Add the chopped spinach to the skillet and sauté until wilted and vibrant green, about 2-3 minutes. Stir occasionally to coat in garlic oil.
12 ounces tortellini (fresh or frozen)
Pour in the lemon juice and zest, stirring to combine with the spinach and garlic. Allow the mixture to simmer briefly, ensuring flavors meld.
12 ounces tortellini (fresh or frozen)
Introduce the cooked tortellini to the skillet, gently folding to combine with the spinach and lemon sauce. Sprinkle in the grated Parmesan cheese and stir until the sauce coats the pasta evenly and begins to thicken slightly. Season with salt and pepper to taste.
12 ounces tortellini (fresh or frozen)
Serve immediately, garnished with additional Parmesan and fresh herbs if desired. The dish should appear brightly coated, with tender pasta, wilted greens, and a glossy lemony sauce.