How to impress someone Spanish with a dish/cooking for them?

I recently made some new Spanish friends and because I'm German, I don't know much about Spanish cuisine.

But I'd like to change that. First, as a new experience for myself, but of course also to surprise my new friends when I'm hosting dinner or a party.

I would appreciate any Infos on Spanish dining culture, advice or recipes!! :))

(I'm really sorry if I should've asked for advice on another subreddit)