Try this thread on Hot Dog Chili/Coney Sauce http://www.roadfood.com/forums/topic.asp?TOPIC_ID=5824
This is my favorite recipe:
In regards to you request I am going to give the recipe for authentic Detroit Coney Sauce. I will also give the proper way to serve it.
First the proper Dog.
Never use a budget dog.
Whenever possible use in this order Koegle, Dearborn, Sabrett,Kowalski,or Boars Head. All with Natural casing!!!!
Dogs must be grilled on a griddle or a cast iron skillet on medium low with a small ammount of butter and vegetable oil. Constant turning of dogs is a must and they must never split open. You will be looking for a consistent light brown color with a darker line of brown on 2 sides.If dogs are straight they can be rolled back and forth regularly to insure even cooking with a large hamburger flipper. If curved use kitchen tongs and adjust next to the other dogs. NEVER BOIL A HOTDOG! The only onion to use is a large very white one. It must be chopped very fine to the point that if it was any smaller it would be a liquid. This is imperative as an onion has a different taste when chopped larger. Onion particles will be about 1/8 inch square.
In a very large preheated pot with 1 cup of lard simmer 5 lbs of ground round and 1/2 lb cow heart ground fine on medium heat until it seperates and turns just brown. This mixture must be stirred regularly and mashed during process to create a kind of rough paste.
In a cast iron skillet put 6 tablespoons of butter and melt it then add 6 tablespoons of flour and make a light brown roux and set aside. Cut 3 tomatoes in half and roast in a 450 degree oven with a little vegatable oil on top until completely cooked and starting to turn into mush with a slight browning taking place. Set these aside.Add 32 ounces of chicken stock to meat simmer for 20 minutes at a slight boil then add roux, cooked tomatoes, 3 tablespoons chili powder,4 table spoons paprika,1/3 cup plochmans yellow mustard,2 tablespoons tumeric, 2 tablespoons cumin powder, 1 tablespoon garlic powder not salt,and 1 tablespoon onion powder. Simmer this down to the proper consistancy.
Steaming buns is the best way in a home enviorment a chinese steamer basket works well or you can wrap them in paper towells and microwave 3 at a time on high for about 20 seconds. Open bun place dog spread slightly thinned yellow mustard over dog. Cover with Coney sauce then top with onions. Additional mustard may be added however cheese or KETCHUP is never allowed lets leave that to the people in ohio ok.