I like lots of cuisines from different countries but one Irish food I cannot live without is soda bread. It's just heaven. It's very simple to make but it requires buttermilk so if you don't eat dairy you can substitute with a plant milk like soya, then you need to curdle it with an acid. Usually lemon juice or apple cider vinegar is recommended but I've found a dash of Asian rice wine vinegar gives the best results with no aftertaste for a vegan version. You don't need to add butter but you can to make it richer or simply use a plant butter or margarine. Darina Allen is queen of the Irish soda bread and this is one of her (many) recipes. I prefer brown soda but white soda is nice too for more of a scone-type bread.
(ETA: If you want to 'fake' buttermilk with regular milk or a plant milk, you need to pour the milk into a measuring jug, then add about a tablespoon of lemon juice, apple cider vinegar, white vinegar or rice wine vinegar per cup of milk. Leave it for a couple of minutes to let it curdle, then stir and add the now 'buttermilk' to the dry ingredients.)
Traditional Brown Soda Bread