At the bottom of the lists, after you've scrolled through and clicked on some restaurants, you should have a "I'll do it myself" button that uses some llm to create a $10 meal recipe using the restaurants you clicked as inspiration.
There's only so many different ways to build a single item like a hamburger, or a chicken salad sandwich.
Eventually, ~all of the necessary recipes will be created naturally just by using the thing, and these results can be cached forever and categorized with keywords.
After that: Subsequent hits look to the cache for a good match rate on keywords, and present an already-existing recipe if it exists.