Clean and gut the fish, head and tail removed or left on. Salt and pepper the cavity. Stuff the inside with thinly sliced onions, lemons, capers, and a few pats of butter.

Wrap in heavy-duty foil and bake at 375 degrees for about 25 minutes or until the fish begins to flake OR cook on an outdoor grill, over medium-high heat for 20-25 minutes, turning once. Enjoy!