I wonder what it would take to build a reverse-recipe lookup API. Something where you can go "I have a ton of mild sauce; what all can I make with it and what else do I need?" Because... I have a ton of mild sauces.
Makes me wish I had time to learn Glitch API development. Right now, I just have to skim the proper kitchen tools on Glitch Strategy's wiki. Helpful, but not exactly efficient when I want to use up a certain ingredient.