In large nonstick skillet, heat oil over medium-high heat. Season both sides of fish with salt and pepper; add fish to skillet. Cook until underside browns, about 3 minutes. Turn fish and remove from pan. Reduce heat.
Add onion and bell pepper to skillet; saute about 3 minutes. Stir in tomatoes, and jerk seasoning. Cover and cook until tomatoes break down slightly, about 3 minutes.
Return fish to skillet, browned side up; spoon with sauce.
Cover and cook over low heat until fish is done, about 7 minutes. Serve with brown or white rice or pita bread.