white onions, sliced 1/4 inch thick
Mix the flour, salt, pepper, oil and yolks together.
Gradually whisk in the beer.
Refrigerate the batter 3 1/2 hours to rest before using.
Slice onions, and dip them in the batter.
Deep-fry in 375 degree oil until golden brown.
This batter also works well on other vegetables besides onion rings--and it's great on fish, too.