Meatballs

60g/2oz fine dry breadcrumbs 125ml/4fl.oz light cream 125ml/4fl.oz water 200g/7oz finely minced lean beef 200g/7oz finely minced lean pork 1 1/2 tsp salt 1/2 tsp ground allspice 1 small to medium onion peeled and very finely chopped 1 egg, beaten 75g/3oz butter A few grindings of black pepper