Cut the onions in rings of about 1cm Mix the flour, salt, pepper, beer and egg. The batter must be thick. Thin it out with a bit of soda, if necessary.  Dip the rings in the batter. Heat the oil in a deep pan or a deep fryer and fry the rings for 1-2 minutes, until they are slightly brown and crunchy. Strain on a paper towel and serve.

Recipe adapted from Silver Star Recipe