Over medium heat, melt the tallow or lard. Heat until very hot.
Add the onion and sauté for 1 minute.
Add the spices and stir, heating for 2 minutes.
Add the hamburger; reduce heat to very low and simmer for at least one hour to let the flavors develop. Stir regularly to ensure the meat is broken up to be as small as possible.
Place grilled Koegel Viennas or Koegel Coney Franks dogs in steamed buns and top with Gillie’s chili, mustard, and raw diced onion.