Blend brown sugar and curry powder in small, heavy saucepan. Over medium heat, add soy sauce, tomato sauce, garlic and onion, stirring until well blended. Bring to a boil, reduce heat and simmer for 5 minutes. Cool.
Place steaks in a large zipper bag, and pour marinade over and ensure that air is pressed out of bag before sealing. Marinate 4 to 6 hours or overnight in refrigerator.
Preheat grill to medium high. Remove steaks and add to grill. Lower temperature to medium and grill approximately 15 minutes per side.
Pork steaks want to be cooked longer than other pork cutlets, as they are more marbled and the fats need to be rendered longer to tenderize the meat. Do not undercook a pork steak. It will be a sad waste of a Schinkels’ pork steak.