Slice the feta into ⅓-inch thick slices. Place them in a pie dish or other flat vessel with a rim.
Mix together the olive oil, lemon zest, garlic, rosemary, oregano, chili flakes, pepper, salt and cinnamon. Pour the marinade over the feta cheese.
Cover and refrigerate for a minimum of 30 minutes up to 3 days ahead of time.
Slice the figs into thin slices, lengthwise from the top to the bottom.
Remove the feta from the fridge. Place a sliced fig on the crostini, drizzle with a little of the marinade from the feta. Top each fig with a piece of feta. Serve.
