Put 15ml of olive oil into a pan on a medium heat. When hot, add the onions and peppers and cook for 15 minutes. Add the chorizotos and fry until they caramelize and start to lose some of their juices. Add the bay leaf and cider, then cook until reduced slightly and amalgamated with the chorizo juice to make a sauce (around 5–6 minutes). Season to taste.
Put the rest of the olive oil into a large pan on a medium heat. Season the skate with salt and pepper. Depending on the size of your pan, you might need to cook the fish in two batches. Fry the thickest side first, for around 4–5 minutes, then flip and season the other side and cook for around 2–3 minutes. To check if the skate is cooked, pierce with a knife to see if the flesh comes away from the bone. If it’s still attached, give it another 30 seconds or so. Remove from the pan and leave to rest for a couple of minutes.
Serve the skate with the chorizotos and peppers on the side, and sprinkle over the chopped parsley.