1. In a large bowl combine the turkey, oatmeal, onion, pepper, zucchini, tomato catsup, oregano, parsley, onion powder, garlic powder, and salt-free seasoning. Mix well and shape into 4 burger patties.
2. Spray a broiler pan with nonstick cooking spray. Place burger patties on broiler pan. Broil 5 to 6 inches from the heat source for 5 minutes on each side. (Or cook burgers on the barbeque or in a skillet that has been sprayed with nonstick cooking spray.)
3. Serve patties with hamburger buns and top with mayonnaise, tomatoes, red onion, and lettuce leaves.
Makes 4 servings.