A recipe? Do you really need a recipe for that? Uhm…ok:
Take some sardines, clean them, salt and pepper them, flour them a bit if you want, put them in a hot, oiled (olive oil would be apt but not a must) pan (charcoal or even a nice open fire would be way better. No flouring is needed in those cases!), roast them until they are nicely coloured and the skin is crispy. If you used a pan: add a good knob of butter together with some garlic and chillies. let if foam up and toss and turn the sardines in it for a minute or two. The garlic shouldn’t get a colour at all, most sorts of garlic tend to get quite bitter when brown.