Sweet and sour is a classic combination of flavours in Italian Jewish cuisine and one that we love in my family, in particular in these shallots. My daughter Bianca can eat the whole lot in one go! In Italy, we make it with fresh, ready-peeled small white onions which are easily found in bags in markets - so wonderful! - and cuts the prep time to nothing. In the UK, a good version can be made with small, round brown shallots. They taste great but the