preheat the oven to 400F/200C.
Peel and core the apple and cut into slices then lay the slices on a baking sheet lined with parchment paper. Bake the apple slices for around 20min until they look dry on top and are just starting to color. Let them cool a little but leave the oven on.
Meanwhile cook the bacon until crisp - either fry, grill or you can also do in the oven on a baking sheet for around 20min, turning now and then. Drain excess fat and break up the slices.
In a food processor, add the dry ingredients - flour, cornmeal, baking powder and salt - and pulse to mix.
Dice the butter and add to the flour mixture. Pulse until you get a breadcrumb-like texture.
Add the apple, bacon and buttermilk and pulse to combine. Try not to overmix or break things up too much, you want it just combined and a little chunky.
Turn the mixture out onto a floured surface, flatten it out to around ⅔in/2cm thick and cut into squares/rectangles/triangles.
Carefully transfer the scones to a lined baking sheet and bake for approx 20min until browning around the edges.