Start your Grill on 'smoke' with the lid open until a fire is established in the burn pot (3-7 minutes). Preheat to 400F.
Combine dry ingredients in a large bowl. Pour in buttermilk 1/2 cup at a time until the dough forms. Irish Soda Bread is supposed to be clumpy so don't worry about all the lumps.
Ball the dough into one ball and place on a cookie sheet with parchment paper. Cut diagonal line across the top of the bread.
Place in your preheated Grill and bake for 45 minutes.
Let cool for a couple minutes, slice and serve with butter and jam. Enjoy!