I tried this for my vegetarian daughter. Take a cabbage cut into 1/4's. Scoop 2 to 3 holes into each quarter and place butter into the scoops. Sprinkle with a little salt and pepper. Double wrap with foil and place into hot bed of coals and cook for 8-10 minutes. Unwrap and eat. Both I and my daughter loved the flavor and so easy to do.
Reminds me that its been a little too long since my last boiled dinner. I'll have to pick up some cabbage on the way home.