BBC Food - Recipes - Yorkshire turkey cake on crushed peas

Ingredients

• 500g/1lb 2oz plain flour , plus extra for dusting
• 200g/7oz self-raising flour
• ½ tsp baking powder
• 1 litre/1¾ pints chilled water
• 1 tbsp malt vinegar
• 1 tbsp soy sauce
• ½ tsp grated root ginger
• 4 slices cooked turkey (about 200g/7oz)
• vegetable oil , for frying
• 1 large floury potato , peeled, sliced into 8 equal-sized thin slices
• 50g/2oz butter
• 1 shallot , finely chopped
• 340g/11¾oz frozen peas
• 2 tbsp chopped fresh mint leaves
• splash malt vinegar
• salt and freshly ground black pepper