sausage stuffed mushroom recipe

Ingredients 1 pound large white or cremini mushrooms, stems removed and finely chopped 1/2 pound Italian sausage, casings removed 1 small onion, finely chopped 2 cloves garlic, minced 1/4 cup breadcrumbs 1/4 cup grated Parmesan cheese 1/4 cup cream cheese, softened 2 tablespoons fresh parsley, chopped 1 tablespoon olive oil Salt and black pepper to taste