Preparation
Prepare grill. Place bread in a food processor and process for 30 seconds or until finely ground. Place bread crumbs in a large mixing bowl; add milk and toss with a fork to moisten. Add salt, pepper, and beef, stirring just until combined. Divide meat mixture into 16 equal portions, shaping each into a 3 1/2-inch patty. Spoon 1 tablespoon cheese in the center of each of 8 patties; top each with 1 remaining patty, pinching edges to seal. Place patties on grill rack coated with cooking spray. Grill 4 minutes on each side or until desired degree of doneness. Remove from heat; keep warm. Lightly coat cut sides of buns with cooking spray; place cut sides down on grill rack and grill 30 seconds or until toasted. Serve patties on toasted buns with desired toppings.

Yield
8 servings