Grilled Mushroom and Swiss Burgers

Ingredients:

Directions:

1. Heat gas or charcoal grill to medium heat. In 12-inch nonstick skillet, melt 2 Tbsp. butter over medium-high heat. Add mushrooms, soy sauce and garlic; cook until mushrooms are tender and liquid evaporates. Set aside; keep warm.
2. Shape beef into 6 (1/2 inch thick) patties. Sprinkle with garlic powder, seasonedsalt and pepper.
3. Place patties on grill; cover grill. Cook with medium heat 8 to 10 minutes, turning once, until meat thermometer inserted in center of patties reads 160°F. Place cheese slices on top of burgers; cover and cook 1 to 2 minutes longer or until cheese is melted.
4. Meanwhile, while burgers are grilling, saute? onions in remaining tablespoon of butter in skillet until lightly browned, about 5 minutes and sprinkle with seasoned salt and pepper; set aside.
5. Place burgers in butter-toasted buns. Divide cooked mushrooms evenly overburgers. Top with saute?ed onions and tomato slices, if using.