Place fish in single layer shallow baking pan. Measure the soy sauce,
onion, ginger, sesame seeds and sugar into blender container; process
on low speed 30 seconds, scraping down sides once. Pour sauce over
fish; turn over to coat both sides. Marinate 30 minutes, turning fish
over occasionally. Remove fish and grill 4" from heat source or moderately
hot coals 5 minutes on each side, or until fish flakes easily when
tested with fork.
