In a large pot, bring salted water to a boil. Add the tortellini and cook according to package instructions until al dente, typically 3-5 minutes. If using frozen tortellini, it may take a couple of minutes longer. Reserve about 0.5 cup of the pasta water, then drain the rest.
Add the chopped spinach and cook until wilted, about 2-3 minutes. Stir in the chopped basil, integrating it into the mixture.
Add the drained tortellini to the skillet, tossing gently to coat the pasta in the herb butter. If the mixture seems dry, gradually add some reserved pasta water until desired creaminess is reached.
Stir in the Parmesan cheese, lemon zest, and season with salt, pepper, and red pepper flakes (if using). Mix until the cheese has melted and everything is well combined.
Plate the tortellini, then top with halved cherry tomatoes and fresh parsley. Serve immediately for a warm, comforting meal.
Notes
Feel free to customize the garnishes according to your preference.
Keyword comfort food, herb butter, pasta, tortellini