Yes I cook the hamburger with onions and some seasonings. I dont know why but if I use homeade pizza sauce or better store stuff it just aint the same. I hate the stuff otherwise.
Canon guy thats how I make them and they are delicious. For some reason the only sauce like on them is Chef Boyardee pizza sauce. Mix sauce hamburger and cheese together has to be thick so it stays on. I toast the bun first so it dont get soggy. Throw more cheese on top and bake em up. Delicious. Last time I finished in smoker to melt the cheese. Even better.