That is, if you're cooking 4 filets, mix together 4 tsp each of the honey, mustard, and vinegar.

Preheat the broiler.

Put the filets on a broiler pan (lining the bottom with foil if you'd like an easier clean-up). Brush the top of the fish with half the honey-mustard sauce. Broil 3-5 minutes, turn over, brush the other side with the rest of the sauce, and broil another 3-5 minutes, until the fish flakes easily with a fork.