- Combine beef and 1/3 cup marinade; shape into 6 patties.
- Grill or broil 3 minutes on each side, or until thoroughly cooked, brushing with remaining 2 Tbsp. marinade halfway through cooking.
- Spread both halves of buns with mayonnaise. Place lettuce, burgers, onion and tomato on bottom halves; cover with top halves.