Wash and trim squash. Cut lengthwise,
slice off top and hollow out.
Leave 1/2" shell on each.
Combine pulp with onion and
saute in butter until soft.
Stir in remaining ingredients.
Cook until soft.
Divide mixture between the zucchini shells.
Wrap each in foil, sealing well.
Place on rack in pressure cooker, and close cover.
Place pressure regulator on vent pipe
and cook 10 min. Cool at once.
Serve hot or cold.
May be done in oven at 375F,
allowing 25 min. cooking time,
less if zucchini are quite small and tender.