italian sausage and penne pasta

Ingredients

• 1 - 16 oz box of penne pasta white or tricolor
• 2 tablespoons olive oil
• 1 pound sweet italian sausage links, casings removed and crumbled
• 1/2 teaspoon crushed red pepper flakes
• 1/2 cup diced red onion
• 4 cloves garlic, minced
• 1 cup sliced mushrooms
• 1 tablespoon butter
• 1 - 28 oz can of diced tomatoes, drained
• 1 1/2 cups heavy whipping cream or you can use half and half( i used heavy cream)
• 1/2 teaspoon salt
• 1 teaspoon black pepper
• 1 teaspoon italian seasoning
• 1/2 cup shredded parmesan cheese
• - shredded parmesan for topping
• - parsley, fresh or dried for sprinkling