11. Put a little olive oil in pan. Brown sausage over med heat. Add onion and green pepper, simmer 5 minutes until tender. Add diced tomatoes and mushrooms. Simmer for 10 minutes. Add pepperoni and garlic, simmer 10 minutes. Add tomato sauce and spices. Turn down to low, simmer 30-60 minutes until desired thickness, stirring occasionally. Serve over spaghetti noodles with a little parmesan cheese.