I don't feel the need to call it a bacon alternative or "vegan ____" but cooking cremini or shiitake mushrooms so that they feel and taste kinda like bacon is sick
(roughly sliced, toss in a bit of salt to draw out some moisture, then toss with more salt and sesame oil along with seasoning to taste(I like Cajun seasoning mix+cracked pepper as a base), cook well done(along with whatever aromatics you like), serve with scrambled eggs or pierogis or whatever)