Without going to google, definitely paprika/pimenton as the key Spanish spice, Mrrzy; but, once Steve looks into it, I'm sure he can give the culinary details better than I...

Mostly vegan, in 2018, I enjoyed patatas bravas, with a glass of sangria, at one of many nice tapas bars in Barcelona. Fried chunky potato chips (I recall the Hairy Bikers boiled them first), again with paprika.

The other dish I enjoyed on that trip was vegetable paella - it always seemed to be second down on restaurant lists, after the seafood option.