Combine Ground Beef, green onions and cumin in medium bowl, mixing lightly but thoroughly. Lightly shape into four 1/2-inch thick patties.
Place patties on grid over medium, ash-covered coals. Grill, covered, 8 to 10 minutes (over medium heat on preheated gas grill, covered, 7 to 9 minutes), until instant-read thermometer inserted horizontally into center registers 160°F, turning occasionally. Season with salt and pepper, as desired.
Place burger on bottom of each bun; top with cheese and tomato. Close sandwiches.
Nutrition information per serving: 381 Calories; 171 kcal Calories from fat; 19 g Total Fat; 8 g Saturated Fat; 7 g Monounsaturated Fat; 83 mg Cholesterol; 313 mg Sodium; 23 g Total Carbohydrate; 1.4 g Dietary Fiber; 28 g Protein; 3.8 mg Iron; 6.3 mg Niacin; 0.4 mg Vitamin B6; 2.4 mcg Vitamin B12; 5.8 mg Zinc; 26.8 mcg Selenium;