Portobello Mushroom and Onion Burger Topping

Description
A savory topping of sautéed portobello mushrooms and onions, perfect for adding depth and umami to any burger, meat or vegetarian.
Ingredients
- 4 ounces portobello mushroom 1/2 cup chopped onion
- 1 teaspoon olive oil 1/4 cup water
- 1/4 cup steak sauce or vegan steak sauce
- 1 (10 ounce) package morningstar farms® grillers® prime veggie burgers, grillers® vegan burgers, or grillers® original
- 4 hamburger buns
Directions
- Saute mushrooms and onion in olive oil in large saucepan for 3 to 4 minutes. Add water and cover with lid. Simmer another 3 to 4 minutes. Remove lid and add steak sauce.
- Prepare veggie burgers according to package directions. Serve burger on bun with warm topping.
- ON THE GRILL: Preheat grill. Use a food thermometer to be sure patties reach minimum internal temperature of 160 degrees F.