COMBINE flour and salt in small bowl. Cut onions into 1/4-inch slices. Separate into rings. Soak onion rings in milk; dip in flour mixture.
HEAT 2 to 3 inches oil in deep saucepan or deep fryer to 375ºF. Fry a few onion rings at a time until lightly browned, 2 to 3 minutes.
DRAIN on paper towels. Sprinkle with salt.
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*Percent Daily Values are based on a 2,000 calorie diet