thanks, hadn’t heard of ketchup leather.
found a recipe for it; in fact, for the entire Plan Check burger which has other fascinating elements, Japanese-influenced: the ketchup leather has dried shiitake mushrooms, the “American” cheese slices are flavored with dashi, the fried onions are made with chicken skin and fat (ok well that’s Jewish schmaltz), and the bun is augmented with panko crumbs!
