This simple quick bread is made with just a few basic ingredients. It gets its name from the baking soda that’s used as the leavening agent, which reacts with the acids in the buttermilk to give the bread the rise it needs. In old Irish lore, it’s said that the criss-cross in the top is to ward off evil spirits! Serve it with sweet cream butter and preserves or marmalade for a delicious breakfast or snack.