Creamy Mushroom Alfredo Fettuccine

Bring a large pot of salted water to a boil. Add the fettuccine and cook for 6-7 minutes, or until just al dente. Reserve a little pasta water, then drain.

While the pasta cooks, melt the butter in a large skillet over medium heat. Add the onions and mushrooms, then cook for 10-15 minutes, stirring occasionally, until the mushrooms release their moisture and the onions soften.

Stir in the garlic, salt, and black pepper. Cook for about 1 minute, just until the garlic is fragrant.