I've been using salsa to grill fish lately...it's wonderful!
Place each fillet (eg, sole, cod, red snapper) onto aluminum foil, on each side: brush with olive oil, squeeze lemon, sprinkle with garlic powder, onion powder, cumin...put 2 tbs salsa onto the top of the fillet, seal alum foil and grill for 15 minutes.
Delicious!!! and easy peasy.