Separate the onion slices into rings, and set aside. In a small bag, mix together the flour, baking powder and salt
Put the flour mix into a big resealable bag, throw all my onion slices in and shake really well until they’re all coated. Then take the onions out, add the milk/egg to the bag and stir well.
Add the onions a handful at a time, seal bag and mush the bag until all slices are coated, take out with tongs and put on wire rack over foil or wax paper
put my panko breadcrumbs into a big Tupperware bowl, add the onions a handful at a time (with tongs), put the lid on and shake.
Put the onions from the bowl directly into the hot oil with clean tongs.