Steps:
Slice onions in rings. Set aside.
Prepare a bowl with flour, baking powder and salt. In another bowl, beat the eggs and milk. Then, on the third bowl, add the bread crumbs.

Dip each onion ring into the flour mixture, until fully coated. Transfer to the egg mixture and use a fork to turn until coated. Then, place onion in the bread crumbs and turn several times until fully coated. Repeat until done.

Heat a deep frying pan and fill with oil. Fry onion rings in batches about 3-4 pieces until golden brown. Serve with ketchup or mayonnaise. Enjoy!