This is a fabulous recipe for when the weather turns a bit cooler, the rich Oloroso Sherry sauce will really warm you up. Tuna is a very “meaty” fish and works well with the stronger flavours of this recipe.
This is a version of atún encobollado (tuna with sweet onions), a recipe given to Moro by Miguel Valdespino of the famous Valdespino sherry bodega in Jerez. Look out for deep red/purple shiny, firm flesh. Serves 4.
4 thick tuna steaks, about 200-225g each
1 garlic clove, crushed to a paste with salt
200ml medium-dry oloroso sherry (Tesco sell Oloroso Sherry)
3-4 tbsp olive oil
3 large Spanish onions, thinly sliced
small bunch flat-leaf parsley, roughly chopped
1 lemon, quartered
First marinate the tuna. Place the tuna in a dish and rub the garlic all over. Pour over a third of the sherry and leave to sit an hour in the fridge before cooking.
Meanwhile, place a large frying pan over a medium heat and add the olive oil. When hot, add the onions and a pinch of salt. When the onions have wilted, turn down the heat and continue to cook for a good 20-30 minutes, stirring occasionally, until they are golden brown and sweet in smell and taste. Pour off any excess oil, add the remaining sherry, and simmer until the alcohol has evaporated and you have a nutty, rich sauce. Set aside.
When you are ready to cook the tuna, heat a clean frying pan until very hot. Add a drizzle of oil followed by the seasoned tuna, and fry briefly on both sides, depending on how rare you like it and the thickness of the cut. When it is almost cooked, add both the marinade and the onion sauce to the pan to warm through (or use a griddle pan instead and warm the sauce separately). Serve immediately with the parsley sprinkled on top and the lemon.
I like to serve this with another Moro recipe- Mashed Potato with Garlic and some green beans.
You can buy the Moro cook book on Amazon: