1poundmushroomswashed, stems trimmed and thinly sliced
3green onionsthinly sliced into rounds
4clovesgarlicfinely chopped
5ouncesbaby spinach
1/4teaspooncrushed red pepperor more
salt and freshly ground black pepper
2ouncesgrated Parmesan cheese
chopped fresh parsleyfor garnish, optional
Instructions
Bring a large pot of salted water to boil. Cook pasta according to package directions until al dente (firm to the bite). Drain, reserving 1 cup of pasta water.
Melt 2 tablespoons of the butter in a large skillet over medium-high heat. Add mushrooms and cook, stirring occasionally, 7 to 9 minutes, until liquid releases then mostly evaporates and mushrooms are tender and golden brown.
Reduce heat to medium and add green onions and garlic; cook and stir until onions soften and garlic is fragrant, 2 to 3 minutes. Add spinach, one large handful at a time, stirring until just wilted. Add remaining 4 tablespoons butter and stir until melted.
Add drained pasta and ⅓ cup of reserved pasta water to spinach and mushroom mixture; toss well to combine, adding more pasta water if pasta seems too dry. Stir in crushed red pepper and season to taste with salt and freshly ground black pepper; transfer to serving bowl. Sprinkle with Parmesan cheese and garnish with parsley if desired; serve.