Low-calorie French Fries
Isn't the oil (and bad oil temperature), the main reason for calories in fried food, not the vegetables themselves?

Just coating in corn starch will not help at all, the moisture in the vegetable will still make them limp and oily.

If you do a tempura or batter type frying, then the batter itself becomes the calories sponge.

If you want to make "lower" calories french fries, just do them in the oven.

cut and prepare your potatoes, put them in a bowl and add a little bit of oil (and seasoning) and shake/mix well and put on a sheet and put them in the oven until crispy (flip them around a couple of times).