Cut the onion into round
slices and the celery into small pieces. Saut� them in a frying pan with oil,
butter, and a bay leaf.
Add salt and pepper as
well as the beans.
Heat and then add the
stewed donkey.
Continue heating and add
salt and pepper to taste.
In the meantime prepare
the polenta which will be served on plates with the sauce prepared using the
stewed donkey.