Melt butter in a small sauce pan over medium heat. Add brown sugar and honey and stir to melt together. Remove from heat. Add mustard, soy sauce, olive oil and ginger and cool. Use sauce for basting or cooking fresh fish.

Grill method:

Place fish on a oiled foil lined baking sheet. Season with salt and pepper and pour sauce over fish. Cook fish indirectly over medium heat until it reaches the proper temperature for the type and size of fish used.