Nationwide classics - Juan Bautista Agreda Tortilla de patatas - 'Spanish omelette made with eggs, potatoes and sometimes onions - a true national treasure'. La Bomba de la Barceloneta - 'a ...
Preheat the oven to180C/350F/Gas Mark 4. Place the potatoes in a saucepan with some water, salt and rosemary. Bring to the boil and simmer for 20-30 minutes until the potatoes are cooked through.