Step 1

Cook the spaghetti according to package instructions

Step 2

Add the salt, pepper, oregano, olive oil, minced garlic, diced onion, portobello mushrooms, and baby bella mushrooms to a large skillet

Step 3

Saute the mixture over medium high heat for 15 - 20 minutes, or until the mushrooms release and cook off all liquid

Step 4

Add the pasta sauce and stir until hot (1 - 2 minutes)

Step 5

Serve the sauce over spaghetti

Step 6

Top with optional mozzarella, parmesan, and red pepper flakes