4 oz spinach or arugula , rinsed and dried 4 oz portabella mushroom , rinsed , grilled or broiled , and sliced ( optional ) 4 whole-wheat hamburger buns
INSTRUCTION : Preheat oven broiler on high temperature ( with the rack 3 inches from heat
source ) or grill on medium- high heat . To prepare burgers , combine ground turkey , scallions , pepper , and egg , and mix well . Form into 1 / 2- to 3 / 4-inch thick patties , and coat each lightly with olive oil . Broil or grill burgers for about 7 – 9 minutes on each side ( to a minimum internal temperature of 160 ° F ). Combine mayonnaise and mustard to make a spread Assemble 3 / 4 tablespoon spread , 1 ounce spinach or arugula , several slices of grilled portabella mushroom ( optional ), and one burger on each bun .