Creating Irish Potato Bread is simple if you follow these straightforward steps:

1. Preheat the Oven: Set your oven to 450°F (230°C). Grease a baking sheet or line it with parchment paper.
2. Combine Dry Ingredients: In a large mixing bowl, whisk together the flour, baking powder, baking soda, and salt.
3. Add Mashed Potatoes: Stir in the mashed potatoes until fully incorporated with the dry ingredients.
4. Mix Wet Ingredients: In a separate bowl, combine the melted butter and buttermilk. Mix well.
5. Combine Mixtures: Pour the wet mixture into the dry mixture and stir until a dough forms. If using, fold in the chopped chives for added flavor.
6. Knead the Dough: On a lightly floured surface, knead the dough gently for about 1-2 minutes until smooth.
7. Shape the Bread: Form the dough into a round loaf, approximately 1-inch thick. Place it on the prepared baking sheet.
8. Cut an X: Use a sharp knife to cut a shallow X across the top of the loaf. This helps it cook evenly.
9. Bake: Place the baking sheet in the preheated oven and bake for 20-25 minutes, or until the bread is golden brown and sounds hollow when tapped on the bottom.
10. Cool: Remove from the oven and let it cool on a wire rack for a few minutes before slicing.

These steps will guide you in creating a delightful loaf of Irish Potato Bread that everyone will love!