1-1/2 pounds Ground Beef
1 large sweet onion, cut crosswise into 1/2-inch thick slices
Nonstick cooking spray
4 hamburger buns, split, toasted
Lettuce leaves, tomato slices
Lightly shape Ground Beef into four 3/4-inch thick patties. Brush onion slices with cooking spray.
Place patties and onion slices on grid over medium, ash-covered coals. Grill, covered, 11 to 15 minutes (over medium heat on preheated gas grill, 13 to 14 minutes) until instant-read thermometer inserted horizontally into center registers 160°F, turning occasionally. Grill onions, 10 to 12 minutes or until tender, brushing with cooking spray and turning occasionally.
Season burgers and onions with salt and pepper, as desired.
Line bottom of each bun with lettuce. Place burgers on top of lettuce. Top with tomatoes and grilled onions. Close bun.
Nutrition information per serving: 368 Calories; 90 kcal Calories from fat; 10 g Total Fat; 4 g Saturated Fat; 4 g Monounsaturated Fat; 97 mg Cholesterol; 324 mg Sodium; 27 g Total Carbohydrate; 1.8 g Dietary Fiber; 39 g Protein; 5.3 mg Iron; 9.6 mg Niacin; 0.6 mg Vitamin B6; 3.2 mcg Vitamin B12; 8.6 mg Zinc; 38.4 mcg Selenium;