Pepperoni cheese ravioli

Ingredients:

1 (25 ounce) package frozen cheese ravioli
1/2 pound fresh mushrooms, sliced
1 (3 1/2 ounce) package sliced pepperoni, diced
1 small onion, cut into wedges
1 tablespoon butter or margarine
1 (8 ounce) can tomato sauce
1/4 cup grated Parmesan cheese
1/2 teaspoon garlic powder
1/2 teaspoon dried basil
1/2 teaspoon dried oregano
1/8 teaspoon cayenne pepper
1/2 cup sour cream

Preparation:

Cook ravioli according to package directions.
Meanwhile, in a large saucepan, saute mushrooms, pepperoni and onion in butter until onion is tender.
Stir in tomato sauce, Parmesan cheese, garlic powder, basil, oregano and cayenne. Heat through.
Remove from the heat. Stir in sour cream.
Drain ravioli. Toss with cream sauce.