Heat oven to 400°F. In small bowl, mix together bitter orange marinade, olive oil, lemon juice, cilantro and garlic; set aside.
Unfold banana leaf. Cut off tough rib that runs along bottom edge of leaf with kitchen shears. Carefully cut leaf into 4 (8-inch) pieces.
Place tilapia fillet in center of banana leaf; season with Adobo Light. Stir reserved bitter orange mixture to combine; spoon 2 tbsp. mixture over fish. Top fish with ¼ cup each peppers and onions. Fold two ends over fish to enclose; fold in two edges to form packet. Using kitchen twine, tie packet to secure; transfer to baking sheet. Repeat with remaining ingredients to form 4 packets.
Bake until fish is cooked through (thin knife inserted into center of fish packet comes out warm), 20 minutes; transfer to plates. Cut ties and discard. Open packets (banana leaves are not edible). Serve immediately.
Eat seafood in place of meat or poultry twice a week. Select a variety of seafood – include some that are higher in oils and low in mercury, such as salmon, trout and herring.