1In small bowl, mix sauce ingredients; set aside.
2In medium bowl, mash beans with fork. Stir in remaining patty ingredients. Shape mixture into 4 patties.
3Spray 10-inch nonstick skillet with cooking spray. Cook patties in skillet over medium heat about 10 minutes, turning once, until light brown.
4Top bottom halves of buns with patties, sauce, tomato and lettuce. Cover with top halves of buns.