Season the chicken thighs with salt, pepper, and garlic powder.
In a 12 inch skillet on high heat sear the chicken on both sides about 2 minutes on each side. The chicken will not be cooked. Remove from the pan, place on a plate, and set aside.
Reduce the heat to medium and add the olive oil, shallots and oregano. Cook until the shallots have softened and the bits from the chicken have come off the bottom of the pan. Add the lemon juice, lemon zest, white wine, and kalamata olives. Cook for 5 minutes and remove from the heat.
Add the chicken back to the pan along with the feta. Bake for 25 minutes or until the internal temperature has reached 165°F or 74°C.
Remove the chicken and olives. Pour the remaining the liquid and feta into a blender. Blend until smooth. Serve with the baked chicken thighs.