Promoted in 1983, the Chicken McNuggets are made from small boneless chicken nuggets coated in breadcrumbs, which consist of thigh meat and chicken breasts, 50% each, and were invented by a chef, René Aaron, who pushed off from McDonald's, and who also invented the Chicken McNugget sauce. Chicken McNuggets are coated on the outside with a layer of batter, then a layer of bread crumbs, and finally a layer of custard batter. After being pre-fried, it is quickly frozen to preserve its freshness and quality. Chicken McNuggets are served with a sweet and sour sauce made from Japanese sauce and pureed apricot, and a garlic sauce made from sugar, vinegar, jalape?o, salt and garlic.