One of our all-time favourite recipes, from Viva!’s Vegan Recipe Club Ingredients: 3 large, very ripe bananas (those spotty ones on special offer are just the job. Cheap, too) 60g/2oz vegan margarine, eg Pure, Suma, Biona or Vitaquell OR 50ml vegetable oil (mild-flavoured type, eg refined plain veg oil or sunflower) 100g/generous 3oz soft brown…