Combine brown sugar, dry mustard, onion salt, soy sauce and lemon juice, mixing well. Simmer sauce five minutes, stirring occasionally.
Place ham steaks on grill three to four inches above medium coals. Cook 30 minutes, turning steaks every five minutes and brushing with sauce. Serve steaks with a sauce. Garnish with heated pineapple slices, if desired.
4 each boneless ham steaks
5 tablespoons brown sugar
1 tablespoon dry mustard
1 teaspoon onion salt
2 teaspoons soy sauce
2 teaspoons lemon juice
1 cup unsweetened pineapple juice
1 can pineapple slices -- (8 oz)