Peel and finely slice the potatoes, cut the artichokes into slices from the top, down towards the petals. Finely chop the onion, garlic, mint, parsley and pit the olives.
Take a terracotta casserole dish (taieddha) or a high-sided oven dish.
Put a layer of potatoes, then one of artichokes, adding the chopped vegetables and herbs, the capers, olives, salt, pepper, oregano and Pecorino.
Repeat three times, ending with the potatoes, sprinkle with breadcrumbs and grated Pecorino.
Pour over half a glass of water, a drizzle of the oil from the artichokes and bake in an oven preheated to 170°C for about 40 minutes.
Service nice and hot.