Preparation / Directions:
1. Heat oven to 400øF. Sprinkle fish with 1¦8 teaspoon salt and pepper. Place fish in glass baking dish. Cut one half onion into thin slices. Cut 4 thin slices from half of lime. Arrange lime and onion slices on each fillet. Bake fillets 12 to 15 minutes, or until just cooked.
2. Meanwhile, remove white pith from oranges; cut into segments, then cut each segment in half. Transfer orange pieces to small bowl. Mince 1 tablespoon onion from remaining onion half and squeeze 1 tablespoon lime juice from remaining lime half; add to orange pieces with avocado, jicama, cilantro, jalapeño, and remaining 1/8 teaspoon salt. Serve with baked fish.