This is really good! Be careful with the chili powder, it matures after it sits, so it may not taste like enough to start with, but give it a bit first.
Feta really does work equally well.
If you eat this right away, ti's really good. But if you let is sit for half hour or more, the chili powder really matures, and is a bit overpowering. I changed the chili powder from the original recipe from 1 Tbsp to 1/2 Tbsp (1 1/2 tsp), and then I would suggest sprinkling just a bit over top on your plate. Enjoy!