In a large bowl, combine all ingredients except for the lettuce and tomatoes. Mix well.
Shape turkey mixture into 8 even 1/2 inch thick patties. Place patties on greased broiler pan and place in heated oven. Broil for 8 minutes; turn patties over and broil for another 8 minutes. Meat thermometer placed in the centre of the patties should read 165F /74C.
Lightly toast halved buns in a toaster oven or place in broiler pan and broil cut-side up for 1-2 minutes. Once toasted, place the patties on lettuce-lined buns and top with tomato slices.
Grilled burger patties: Heat grill and lightly oil grill rack. Place patties on grill over medium heat. cover and cook for 10-12 minutes, turning once, until meat thermometer placed in the centre of the patties reads 165F /74C.