Old Fashioned Onion Rings

1 lg Onion cut into 1/4 inch slices
1 1/4 c Flour
1 t Baking Powder
1 t Salt
1 Egg
1 c milk
3/4 c Crushed Croutons
Seasoned Salt
Oil
Heat oil in eep fryer to 365 degrees.  Seperate onion slices into rings.  Mix flour, salt and baking powder. dip onion slices in flour to coat.  Set aside.  Whisk egg and milk into flour. Mix with a fork.  Dip floured rings in btter then place on wire rack to drain until batter stops dripping.  Put rack over foil for easier cleanup  Put crushed crouton in shallow dish.  Place rings into crumb mixture and scoop crumbs over ring to coat.  Give the ring a hard tap as you remove it from the crumbs.  Deep fry a few at a time for 2-3 minutes or until golden brown.  Remove to paper towels to drain.  Season with sasoned salt.