Parmesan Tagliatelle with Buttered Mushrooms - Serving Dumplings

Ingredients

• 7 ounces tagliatelle
• 14 ounces cremini mushrooms (cut into slices)
• 3 ounces grated Parmesan (more for serving)
• 2 tbsp butter
• 2 tbsp olive oil
• 3 tbsp chopped parsley
• 1 onion (diced)
• 4 garlic cloves (minced)
• ½ tsp red pepper flakes (more for serving)
• 2 tsp black pepper
• 1 tsp salt