1. Combine soy, oil, garlic, ginger and fish in bowl.
Marinate 10 minutes.
2. Cut four 20" lengths of parchment paper or aluminum foil; fold each in half. Starting at folded side, cut out half a heart shape. Open hearts on flat surface. Spread 1/4 of the vegetables on one side of each heart. Place a fish fillet on top of each; spoon any remaining marinade over fillets. Fold paper over; seal by double pleating edges all around. Place packets on large baking sheet.
3. Bake in preheated 375'F. oven for 15-20 minutes or until fish flakes easily with fork; carefully open one packet to test. If using foil packets, check fish after 12 minutes. Open packets; serve.