Season the chicken breasts generously with oregano, paprika, garlic powder, onion powder, salt, and pepper on both sides.
Heat a skillet over medium high and add the avocado oil. Once the oil is shimmering, add your chicken and cook, undisturbed, for 8 minutes on each side. Let the chicken sit for 5 minutes before slicing into bite-sized pieces
Meanwhile, chop the cherry tomatoes, cucumber, pepperoncini, parsley, and dill and, dice the red onion. Mince the garlic.
In a small bowl, whisk together your yogurt, lemon juice, olive oil, red wine vinegar, oregano, dill, and garlic and season to taste with salt and pepper. Set aside.
Add the prepared vegetables to a large bowl together with the chicken, pour over the dressing, and toss all of your ingredients until evenly coated. Serve into 2 bowls and enjoy!