Flyboy Dave, were you frying or baking in the oven? It looks like you scorched the piston, either from not turning it over enough or you had the burner set too high! Soy burns at high heat... I bet you had to scrape that pot out with a Brillo pad!
All kidding aside, what happened? Too lean? No oil??? I need to know, I don't want that to happen to mine! Looks Ugly!