If using a grill, preheat the grill on high, clean and oil the grate; otherwise, heat a well seasoned cast iron skillet on the stove until it is very hot. If the grill or skillet are not well seasoned and oiled, the patties will stick.

Meanwhile, mix the turkey, egg, onion, herbs and salt together by hand and form four equal size patties measuring about 3 to 4 inches in diameter.

If using a grill, brush oil on both sides of the patties; if using a cast iron skillet, pour a scant tablespoon of oil into the skillet and swirl to coat the pan.

Grill or fry the patties for approximately 5 to 6 minutes per side, until the internal temperature reaches 160º F (use an instant read digital thermometer). Only flip the patties once, and don’t flip until a crust has formed or they’ll probably fall apart. When grilling, brush more oil on the uncooked side of the patty before flipping it.

If cheese burgers are desired, place the cheese slices on top of the patties after they have been flipped and cooked an additional two minutes or so. To make the cheese melt more quickly, cover the skillet with a lid or cover with a metal cake pan on the grill.

Serve on hamburger buns with condiments and vegetables.