Prepare the Ingredients: Clean and thinly slice the cremini mushrooms, mince the garlic, and rinse the spinach. Gather all your ingredients to streamline the cooking process.

Cook the Pasta: Boil salted water and cook the protein pasta according to package instructions, reserving ½ cup of pasta water before draining.

Sauté the Mushrooms: Melt butter in a skillet over medium heat, add sliced mushrooms, and sauté for 6-8 minutes until golden.

Add Garlic and Spinach: Add minced garlic, spinach, Aleppo pepper flakes, salt, and black pepper. Sauté for 2-3 minutes until spinach wilts.

Combine Pasta and Sauce: Mix in cooked pasta with reserved pasta water and sherry wine, adding more water if needed to adjust sauce consistency.

Serve and Garnish: Plate the dish, garnish with asiago cheese and black pepper, and serve.