Preheat oven to 425 degrees. Spray oil a 9 or 10-inch round baking pan. In a food processor, add flour, sugar, baking soda,salt and butter and pulse until the butter has a coarse crumb texture. To a liquid measuring cup, add buttermilk and egg and mix well with a fork and pour over flour mixture and pulse until the dough comes together.

Dump dough into the baking pan and with floured hands, gently mold the dough into a a raised dome and continue dipping your hands in flour so they won't stick to the dough. With a very sharp knife, make a large X in center of dough and bake for 45 minutes or until the bread is golden brown and has a hollow thump if you gently tap it. If it is browning too much in the oven, cover loosely with a piece of foil and continue baking.

Remove from oven and place on wire rack. Allow to cool for 10 minutes and then transfer to wire cooling rack.

Slice and serve.