Creating Spinach Mushroom Pasta is straightforward if you follow these simple steps:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add the pasta and cook according to package instructions until al dente. Reserve ½ cup of pasta water, then drain and set aside.

2. Sauté the Mushrooms: In a large skillet, heat the olive oil over medium heat. Add the sliced mushrooms and cook for about 5 minutes until they are browned and tender.

3. Add Garlic: Add the minced garlic to the skillet with the mushrooms. Sauté for an additional 1-2 minutes until fragrant.

4. Incorporate Spinach: Add the chopped spinach to the skillet. Cook for 2-3 minutes until the spinach is wilted.

5. Create the Sauce: Pour in the heavy cream, salt, black pepper, and red pepper flakes (if using). Stir to combine and let it simmer for 3-4 minutes, allowing the sauce to thicken slightly.

6. Combine Pasta and Sauce: Add the cooked pasta to the skillet. Toss everything together, adding reserved pasta water as needed to reach your desired sauce consistency.

7. Finish and Serve: Remove from heat and stir in the grated Parmesan cheese. Garnish with fresh basil or parsley and serve immediately.