Creating Quick Mushroom Spaghetti is straightforward when following these steps:

1. Cook the Spaghetti: In a large pot of boiling salted water, cook the spaghetti according to the package instructions until al dente. Drain and set aside, reserving a bit of the pasta water.
2. Sauté the Onions: In a large skillet, heat the olive oil over medium heat. Add the sliced onion and cook until soft and translucent, about 5 minutes.
3. Add Garlic: Stir in the minced garlic and cook for another minute, ensuring it doesn’t burn.
4. Cook the Mushrooms: Add the sliced mushrooms to the skillet. Cook for approximately 5-7 minutes until they are browned and tender.
5. Season: Sprinkle in the salt, black pepper, and dried thyme. Stir to combine and allow flavors to meld for a couple of minutes.
6. Add Broth: Pour in the vegetable or chicken broth, allowing it to simmer for about 3-4 minutes until slightly reduced.
7. Combine with Pasta: Add the cooked spaghetti to the skillet, tossing well to coat with the mushroom sauce. If it seems dry, add a splash of the reserved pasta water.
8. Finish: Once well combined, stir in the grated Parmesan cheese until melted and creamy.
9. Garnish and Serve: Remove from heat and garnish with freshly chopped parsley.

These easy steps will help you make the most out of your Quick Mushroom Spaghetti effortlessly.