Stuffed Portobello Mushroom

Name: Stuffed Portobello Mushroom
Ingredients: 4 ounces Mild Italian sausage; 2 large mushrooms; 1/2 teaspoon minced garlic; 2 tablespoons chopped onion; 4 tablespoons extra-virgin olive oil (2 tablespoons for topping); 2 tablespoons chopped tomato; 2 tablespoons bread crumbs; 4 tablespoons Parmesan cheese (2 tablespoons for topping); 1 lightly beaten egg; 1 teaspoon finely chopped parsley; salt n pepper (add to taste)