Heat oil in a large nonstick skillet over medium-high heat. Add onion, bell peppers, 1/4 teaspoon salt, 1/4 teaspoon black pepper, and garlic; sauté 20 minutes or until tender. Stir in wine, basil, and oregano; cook 1 minute. Sprinkle fish with the remaining 1/2 teaspoon salt and 1/4 teaspoon black pepper; arrange fish over bell pepper mixture. Cover, reduce heat, and simmer 10 minutes or until fish flakes easily when tested with a fork.