At the same time, preheat the oven to 425F. (you want the oven nice and hot, not just hitting 425F as the bread is ready to go in)
Drizzle the bottom and sides of a 10 inch cast iron pan with remaining 2 Tbsp of olive oil. If you don't have a cast iron pan, feel free to use a metal baking sheet. But then line the sheet with parchment paper first. Then oil.
Push the sliced olives into the dimples. Scatter the rosemary, salt and pepper evenly over everything.
I find a 10 inch cast iron pan is the perfect size for this focaccia.
Store leftover bread in a well sealed bag. It can keep in the fridge for up to a week.
This bread recipe is a riff on the one found here at One Lovely Life.