Лук в кляре

For the Outback sauce: 1, 2 cup mayonnaise 1 tablespoon ketchup 2 tablespoons horseradish sauce 1, 2 teaspoon paprika 1, 4 teaspoon salt 1, 8 teaspoon dried oregano 1 pinch ground black pepper 1, 4 teaspoon cayenne pepper For the onion: 1 large sweet onion 1 cup allpurpose flour 1, 4 teaspoon cayenne pepper 1 teaspoon paprika 1, 8 teaspoon dried thyme 1, 8 teaspoon dried oregano 1, 4 teaspoon ground cumin 1 teapoon salt Freshly ground black pepper 1 large egg 1 cup whole milk 1 gallon vegetable oil