until crisp. Drain on paper towelling and crumble. Peel and slice
potatoes onto a large piece of doubled heavy-duty aluminum foil. Add
onion and separated into rings. Add bacon bits, cheese, salt, pepper and
chervil and toss all together lightly. Dot with butter or margarine and
drizzle bacon fat over all. Wrap foil loosely around the potatoes,
making double folds to seal well. Cook about 4 inches (10cm) from hot
coals for 1 hour or until tender, turning the package often.
Note : Bake
in oven at 400F (205C) for about the same time, if desired.