Combine the cumin, oregano, garlic and onion powder, salt, and pepper together.
In a cast-iron skillet heat 2 tablespoons of olive oil over medium heat.
Rub the seasoning over both sides of the chicken breast. Place the chicken in the skillet that has the olive oil.
Brown both sides of the chicken. Once the chicken is browned turn down the heat a bit and continue to cook until the chicken is no longer pink inside and the temperature has reached 165 degrees F,
While the chicken is cooking make the cucumber sauce.
Shred the cucumber with a box grater. Make sure to squeeze the liquid out of the cucumber and set aside. Chop the dill and mince the garlic.
Mix the Greek yogurt and the mayonnaise together.
Add the cucumber, dill, and garlic mix until well combined.