Three Cheese Mushroom Bake | Just A Pinch Recipes

Ingredients

• 1 - small onion, chopped
• 14 ounce(s) button mushrooms, cleaned and sliced
• 1 stalk(s) celery, chopped
• 2 tablespoon(s) butter
• 1/2 teaspoon(s) salt
• 1 clove(s) garlic, minced
• 1 large egg, beaten
• 1/2 cup(s) italian bread crumbs
• 1/2 cup(s) shredded mozzarella cheese
• 1/2 cup(s) freshly grated parmesan cheese
• 1/2 teaspoon(s) dried basil
• 4 slice(s) provolone cheese