@agnew_hawk @daubers I would recommend Askama if you want to return templates from a server because the templates are compiled and checked at compile time.
If you want to use templating to build something once before serving it (like with a static site generators), then I would recommend Tera. The static site generator Zola uses it. It is more flexible and you will see errors on building the site anyway.
@daubers
If I might self-suggest ... https://lib.rs/crates/ructe might be worth a look.
To be honest, it doesn't really look like jinja, the major design difference is that ructe converts your templates to code at compile-time. That makes it efficient and it avoids runtime template errors (but makes it impossible to change tempates at runtime).