Preheat grill . When grill reaches 400 degrees F, place fish on grill racks and cook about two minutes per side, just to sear the fish and make grill marks.
Top each filet with 1 tablespoon of pepper jelly. Allow to cook with the lid closed (about 10 minutes for each inch of thickness) . Fish is done when it is opaque on the outside with a hint of translucence at the center.