Examples do not reflect real-world use (data fetching is async)

Describe the issue

The docs and examples talk about data being loaded from a database (which would be an asynchronous process), but they actually show data generated synchronously, such as in simple-usage/recipe.resolver where the source data (items) is available statically. In almost any real-world scenario, createRecipeSamples would be async.

Are you able to make a PR that fix this?

Yes, once I have the knowledge.

Additional context

Love the idea of this library!