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 package Grillers Prime® Veggie Burgers, Grillers® Vegan Veggie Burgers, or Grillers® Original
4 hamburger buns
Your favorite shows, personalities, and exclusive originals. All in one place.