Prepare the Flint Coney sauce, and heat it enough to loosen it.
Grill the Koegel Coney Franks or Viennas until almost done. Cool slightly, then slice to about 1/4" thick. Set aside.
Preheat an oven to 425 degrees F.
Prepare the pizza crust or dough as necessary. Place on the pizza pan.
Spread the Flint Coney sauce on the crust or dough, just enough so you can't see the crust through it, but not too thick.
Add a first layer of pizza cheese as desired.
Lay the sliced Franks or Viennas around on the cheese, flat side down.
Add chopped onion around the pizza as desired.
Starting in the middle, create a spiral of yellow mostard around the pizza, as desired.
Top with one more layer of cheese.
Bake in the 425 degrees F oven for 15 minutes, until both the crust and cheese are golden brown.
Slice and serve.