Cut onions into 1/4-inch slices, and separate into rings.
Combine milk and egg; beat well. Dip onion rings in milk mixture; dredge in flour. Repeat procedure with remaining onion to yield a thick coating on each ring.
Fry onion rings in deep hot oil (375°) for 3 to 5 minutes or until golden. Drain well on paper towels. Sprinkle with salt to taste.
Serving Suggestions: French Fried Onion Rings may be served with any of the following: Dill Sauce, Horseradish Sauce, Mustard Dip Sauce, or any sour cream sauce.