Others like Frank or Jerry can possibly correct me IDK but something like this:

First you fry bacon. But per Uncle Bill it has to be nitrate free to meet his health standards LOL.

Then he takes the grease created by the bacon and uses it to "cook" or "fry" the sandwich bun in.

Then after he has sufficiently fried the bacon and now the bread, he takes the bacon and puts it on the bun.

Last, he puts cheese on top so that it melts while hot, then wraps it in tin foil and sells them in the backyard to the TGenerates in exchange for advice on his pick 5. (handicapping tie in here) For instance, after "selling" a few to the TG-ers he asked everyone about the virtues of his p5 single Covfefe to which everyone he asked (including me to be fair) told him not to use Covfefe. UB didn't play the p5 b/c of this sage advice he received...and you know how that turned out.

Again....I may have this wrong but this is the story as I recall.
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NOTE: Uncle Bill declared after significant "abuse" as he termed it on Saturday about these unhealthy sandwiches that he went healthy and did not fry the bread on Sunday's batch.

UB likes them so much he asked Jerry early Sunday if he wanted one as his batch of 3 or 4 had dwindled down. Jerry asked if he had to decide right then. UB disappointingly said "No, you don't have to decide right now." Then Uncle Bill reached in his bag and got out a lousy piece of fruit to eat instead.