Preheat oven to 400 degrees.

Halve the onions and arrange them in a greased baking dish or on a greased
grill rack, dot with butter, and cook until tinged with black and brown,
nearly charred, for 45 minutes to 1 hour and 15 minutes, brushing with more
butter or oil as necessary to keep moist. Season with salt and pepper.
Serve hot or chilled.

Yield: Serves 6