Original Coney Island Hot Dogs

8 frankfurters
1/3 cup sweet pickle relish
2 tablespoons sweet pickle liquid
1 tablespoon melted margarine
1 teaspoon prepared mustard
1/8 teaspoon pepper
1/8 teaspoon onion salt
1/8 teaspoon garlic salt
8 frankfurter rolls
Cut slits into frankfurters lengthwise almost all the way through. Fill with pickle relish; fasten with wooden picks.
Combine remaining ingredients, except rolls, and mix well. Brush frankfurters with pickle mixture.
Broil or cook on outdoor grill 5 to 7 minutes, brushing frequently with mixture.
Serve in rolls.