1 Tbsp. olive oil
2 onions, thinly sliced (about 2 cups)
1 lb. (450 g) lean ground beef
1 Tbsp. Lea & Perrins Worcestershire Sauce
1/2 tsp. each ground black pepper, garlic powder and onion powder
4 Kraft Extra Cheddar Process Cheese Product Slices
4 pretzel sandwich buns (4 inch), split
1/4 cup Heinz [Seriously] Good Light Mayonnaise Style Dressing
1 Tbsp. A1 Original Steak Sauce
Heat barbecue to medium-high heat.
Heat oil in large skillet on medium-low heat. Add onions; cook 10 to 15 min. or until golden brown, stirring frequently.
Meanwhile, mix meat, Worcestershire sauce and dry seasonings just until blended; shape into 4 (1/2-inch-thick) patties. Grill 4 to 5 min. on each side or until done (160ºF). Top burgers with cheese slices, then place buns, cut sides down, on barbecue grate. Grill 1 min. or until cheese is melted and buns are toasted. Remove from barbecue.
Mix mayonnaise and steak sauce until blended; spread onto bottom halves of buns. Fill buns with burgers and onions.