Adapted from this recipe, to make much simpler and lighter.
4 tilapia filets (or any firm, white fish), about 1 pound
8 rolls, halved and toasted
2 tablespoons Dijon mustard
2 tablespoons pickle relish
1 tablespoon honey
1/2 head (about 1 pound) cabbage, shredded
salt and pepper to taste
Mix mustard, relish, and honey well in small bowl and set aside.
Cut each tilapia fillet in half. Sprinkle lightly with salt and pepper. In a skillet spritzed with nonstick spray, cook the tilapia pieces over medium heat, about 2 minutes on each side, until done.
Assemble sandwiches (on toast or rolls) as follows: spread mustard mixture liberally on the roll, then place 1 tilapia piece on the rolls, and top with a generous handful of shredded cabbage.
Serve with plenty of napkins (this will be messy!)