Salmon Sandwiches with Spicy Apricot Sauce

Heat indoor or outdoor grill. Spray nonstick cooking spray on a piece of aluminum foil large enough to hold the four fillets. Place fillets on foil and sprinkle with juice of the lemon and black pepper. Grill on foil approximately 5 minutes on each side until cooked through (flesh bounces back when pressed lightly, and juices are milky). Toast buns on grill or use a toaster. Place a lettuce leaf on each of the bottom halves of the buns, then top with one salmon fillet. In a small bowl, stir together apricot preserves and sweet chili sauce, then spoon approximately 1 heaping tablespoon onto each salmon fillet; add the top half of each bun to complete.