It's interesting that the idea for ES was born while working on a cooking app.

I'm working on an open source alternative to Algolia, called Typesense (https://github.com/typesense/typesense) and just earlier this month I built a site to showcase Typesense search on a 2M cooking recipes dataset:

https://news.ycombinator.com/item?id=25365397

There's something about searching and cooking I guess!