Make bias cuts about 3/4-inch apart into the fish fillets. (Do not cut completely through fish.) Tuck 1 or 2 whole basil leaves into each cut. Rub fillets with garlic and ginger.
Place peppers and asparagus in a steamer basket. Top with fish. Place basket into a large, deep saucepan or wok in which 1-inch of water is boiling. Cover; steam 6 to 8 minutes or until fish just flakes easily when tested with a fork. Makes 2 servings.