Place fillets on one half of a large sheet of foil. Top fillets with sliced onions and butter mixture. Fold over foil and crimp edges to make seal. This will keep the steam and moisture locked in.
Place in oven and bake for 20 minutes. Remove from oven and let set for 5 minutes. Open carefully to avoid steam. Serve fillets with steamed rice or vegetables of choice.
Place fillets on one half of a large sheet of foil. Top fillets with sliced onions and butter mixture. Fold over foil and crimp edges to make seal. This will keep the steam and moisture locked in.
Place in oven and bake for 20 minutes. Remove from oven and let set for 5 minutes. Open carefully to avoid steam. Serve fillets with steamed rice or vegetables of choice.