I found this recipe online. It is a Better Homes and Gardens recipe. My husband and I love zucchini and grow it in our garden and I am always looking for new recipes. This is a very tasty dish. I hope you enjoy it as much as we do.
1Cut zucchini in half lengthwise.Place cut side down in a microwave-safe 2-quart square baking dish.Microwave covered on 100% power for 2 to 3 minutes or until almost tender. Scoop out pulp leaving a 1/4-inch-thick shell. Set shells aside. Finely chop the zucchini pulp and set aside.
2In a medium saucepan cook onion in hot oil until tender but not brown. Add chopped zucchini and cook 1 minute. Stir in flour, basil and pepper. Add milk all at once. Cook and stir until thickened and bubbly. Cook and stir for 1 minute more. Gradually add zucchini mixture to beaten egg. Stir in Parmesan cheese. Spoon mixture into zucchini shells.
3Bake uncovered in a 350 degree F. oven for 30 minutes or until filling is lightly browned.