1. Place quinoa in a fine sieve; place sieve in a large bowl. Cover quinoa with water. Using your hands, rub grains together for 30 seconds; rinse and drain. Repeat procedure twice. Drain well. Combine 1/2 cup hot water and quinoa in a small saucepan; bring to a boil. Cover, reduce heat, and simmer 13 minutes or until liquid is absorbed and quinoa is tender.
2. Heat a large nonstick skillet over medium-high heat. Place cornmeal in a shallow dish. Sprinkle fish with 1/4 teaspoon salt and 1/4 teaspoon black pepper. Dredge fish in cornmeal. Add 1 tablespoon oil to pan; swirl to coat. Add fish to pan; cook 4 minutes on each side or until desired degree of doneness. Remove fish from pan; keep warm.
3. Return pan to medium-high heat. Add remaining 1 1/2 tablespoons oil to pan. Add bell pepper, jalapeño, garlic, 1/4 teaspoon salt, and 1/4 teaspoon black pepper to pan; sauté 3 minutes. Add corn; sauté 2 minutes. Stir in quinoa, tomato, onions, and juice. Serve fish with quinoa mixture and lemon wedges.
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