In a large bowl mix together the flour, cayenne, oregano, garlic salt, cummin and pepper. Place the onion cut side down into the flour, place a plate over the top of the bowl and give it a few shakes. Flip the onion over and take care to make sure flour gets in between each of the petals. In another large bowl whisk together the eggs and milk. Shake off any excess flour. Dunk the onion, cut side down, into the egg mixture. Flip it over and take care to get the egg mixture gets in between each petal (this is serious guys!). Now place the onion back in the flour mixture and coat it once again. Taking care to… well, you get it by now.