Soda bread is so easy to make and nice with some (salted) butter, honey or cheese. I learned about it and bought it often when I lived in Ireland. It takes less than 40 minutes including baking.
450gr of plain flour
1 teaspoon of soda (sodium-bi-carbonate)
1 teaspoon of sugar
1/2 teaspoon of salt
Preheat the oven to 190°C and butter a tin.
Mix the dry ingredients together in a bowl, add the buttermilk and mix until you have a moist dough.
Transfer the dough to the tin and bake for 30 minutes in the oven.
To double check if it's ready, it should sounds hollow when you tab it.
Leave to cool on a wire rack.