Comté, smoked haddock and chorizo gratin Author: Laura Pope Serves: 4 Ingredients 600g Maris Piper potatoes, peeled and sliced into 3mm thick discs 100g chorizo (spicy or sweet), skin removed, chopped into 1cm cubes 10g unsalted butter 200g banana shallots, peeled and thinly sliced 2 garlic cloves, crushed 2 slightly rounded teaspoons plain flour 150ml