In a medium bowl, combine 1 cup flour, cornstarch, baking powder, salt, lemon pepper, onion powder, milk and egg. Mix until smooth.
Place in refrigerator and chill for at least 30 minutes.
Place remaining 1/2 cup flour in plastic or paper bag.
Rinse cut zucchini strips. Pat dry with a paper towel.
Place strips in to bag with flour. Shake well to coat completely.
Pour enough oil into a deep fryer or deep saucepan to a depth of 2 to 3 inches.
Heat to 375°F.
Remove batter from refrigerator.
Dip floured zucchini in chilled batter. Turn to coat completely. Let excess batter drip back into bowl.
Place battered strips into hot oil. Fry a few at a time for 4 - 4 1/2 minutes, until golden brown, turning several times.
Remove from oil and place on a paper towel-covered plate to drain.
Repeat until all strips are battered and fried.
Serve immediately or keep warm in 175°F oven.
Sprinkle with Parmesan cheese just before serving.