For 4 Person(s)
Soak the beans in plenty of cold water overnight, changing the water at least twice.
On the day, cook in slightly salted water for about 1 hour, until half-cooked. Strain and place in a baking tray.
Prepare the sauce by heating the olive oil in a pan and browning the onions with the garlic. Add sweet paprika and black pepper. Stir and cook until the onions are soft. Add the tomato purée, after dissolving it in 2 glasses of water, and the tomato juice, 2 tablespoons of vinegar and 1 spoonful of sugar. Add salt and mix the sauce well. Empty it over the beans in the baking tray, cover with aluminium foil and bake for 1 hour at 180°C. Remove the foil and bake for an extra 20 minutes until a crust forms over the beans. Remove from the oven, let it cool and sprinkle with the parsley.