1-1/2 lb. ground beef
1/2 cup A.1.® Original Steak Sauce, divided
1/3 cup chopped onions
1/3 cup canned chopped green chilies, drained
6 hamburger buns
1/2 cup guacamole
3/4 cup KRAFT® Shredded Cheddar Cheese
1 large tomato, chopped

1. Heat grill to medium heat. Mix meat, 1/4-cup steak sauce, onions and chilies; shape into 6, 1/2-inch-thick patties.

2. Grill 11 to 13 min. or until burgers are done (160°F), turning occasionally and brushing with remaining steak sauce.
3. Serve in buns topped with remaining ingredients.