Wash and slice zucchini into rounds about 1/4 inch thick.
Combine egg, milk, flour, salt, and garlic salt in a bowl.
Mix well to form batter.
Dip each zucchini round into batter; fry in deep fat.
Batter zucchini as you are ready to fry it, so each piece is coated.
Fry until crisp and golden brown.
Drain on paper towels.