Pat chicken dry and pound the chicken to ensure they are equal in thickness. Combine the olive oil, lemon zest and juice, garlic, salt, pepper and paprika in a bowl. Add chicken and toss well to combine. Marinate for at least 30 minutes.

Meanwhile, to make the tzatziki, peel the cucumber and grate with the larger blades of a cheese grater. Drain any liquid from the cucumber and transfer to a small bowl. Add the yogurt, garlic, lemon zest and juice and olive oil and stir to combine until creamy. Fold in the chopped dill and season with salt.

Preheat a cast iron skillet or non-stick pan to medium high heat. Place chicken on the skillet and allow it to cook undisturbed for 5-7 minutes. Use tongs to flip over and cook until juices run dry, approximately 5-7 more minutes. Discard extra marinade.

Remove chicken from the pan and allow it to rest for 5 minutes before slicing.

Serve in a pita with vegetables and tzatziki sauce, if desired.