Preheat oven to 375°F. Grease a 10-inch cast iron pan.
Mix dry ingredients in a large mixing bowl.
Mix ingredients in a separate bowl to whisk egg well.
Add wet to dry and combine until just a cohesive, shaggy dough.
At this point you can bake immediately, or choose to let ferment for 6 hours or so, but it's using discard not active starter so I love this as a "bake now" type of thing.
Shape the dough into roughly a 6-inch round or divide into four equal pieces to make a clover leaf shape.
Bake for 15 minutes, turn pan around, bake 5-10 minutes more, until lightly browned.
Notes
This bread, much like scones, is best served and eaten the day it's made. You can store in an airtight container and toast any leftovers the next day though.