Baked Bermuda Onions

BAKED BERMUDA ONIONS

5 Bermuda onions, boil in salted water about an hour.
when cool, cut in half, remove part of center, chop, mix with
salt and pepper and a little chopped boiled ham, add the
beaten yolk of an egg, 2 tablespoons cream and fill onions
with the mixture. bake slowly and before serving pour over
onions a cream sauce.