Marinate the chicken by combining chicken breast cubes, olive oil, lemon juice, red wine vinegar, Greek seasoning, and sea salt in a container. Refrigerate for at least 30 minutes.

Prepare the Tzatziki sauce by mixing Greek yogurt, grated cucumber, minced garlic, chopped dill, salt, and black pepper in a bowl. Chill until ready to serve.

Heat a skillet over medium-high heat and cook the marinated chicken for about 3-4 minutes per side until golden brown and cooked through.

Whisk together olive oil, red wine vinegar, oregano, and a pinch of salt for dressing. Set aside.

Assemble the bowls by placing cooked chicken in bowls, topping with diced cucumber, cherry tomatoes, red onion, olives, feta cheese, and Tzatziki sauce.