Cut zucchini in half lengthwise. Place
cut side down in a microwave safe
baking dish. Cook covered on 100%
power for 2-3 minutes or till nearly tender.
Scoop out pulp, leaving a 1/4 inch thick shell.
Set shells aside. Finely chop the zucchini
pulp; set aside.
In a medium saucepan cook onion in hot
oil till tender but not brown. Add chopped
zucchini; cook 1 minute more. Stir in flour,
basil, and pepper. Add milk all at once.
Cook and stir till thickened and bubbly.
Cook and stir 1 minute more. Gradually
add zucchini mixture to the egg. Stir in
Parmesan. Spoon mixture into zucchini shells;
place in a 2-quart baking dish. Bake, uncovered,
in a 350 degree oven for 25 to 30 minutes or
till filling is lightly browned.