We may not be looking forward to winter weather but the cold days do mean that we are likely to be enjoying some great bowls of soup. These tasty savoury muffins are a perfect accompaniment to any bowl of soup. They are packed full of flavour, are easy to make and freeze well. I recommend having all your ingredients ready before starting ie grate the parmesan, grate the sweet potato, crumble the feta and melt the butter. Putting it all together then will very quick. Before doing any of that though, brush some melted butter over your muffin tin.