Add ground beef to a medium- size bowl. Add worcestershire sauce, Mrs. Dash and salt. Mix until well combined.

Form into 4 patties.

Add onion to a dry, non- stick skillet. Cook over medium heat, stirring often until caramelized. Remove from heat and set aside.

Preheat grill or grill pan.

Add burgers to the grill over medium-high heat. Grill hamburgers 5-10 minutes on one side (5 minutes for rare, 10 minutes for well-done)

Remove burgers and cover with foil.

Toast burger buns, cut side down, on grill for ~2 minutes. Remove

buns from grill. Place burgers on buns and top with onion, lettuce, and

tomato if using.