Mushroom Veggie Burgers

Ingredients (9)

• 1 tablespoon olive oil
• 1½ cups finely chopped onion
• 3 small garlic cloves,
• 4 cups finely chopped portobello mushrooms
• 1/4 teaspoon salt
• 1/8 teaspoon freshly ground black pepper
• 1 cup Italian breadcrumbs
• 2 large egg whites
• buns and condiments of your choice