Greek Skillet Chicken

Name: Greek Skillet Chicken
Ingredients: 1 pound boneless and skinless chicken breasts or thighs, pounded thin; 2 tablespoons olive oil; 1 tablespoon lemon juice; 1 teaspoon oregano (or Greek seasoning blend); 1/2 teaspoon paprika; 2 cloves garlic, minced/grated; 1 tablespoon olive oil; 1/2 cup onion, diced; 4 green onions, thinly sliced and divided (lights and greens); 4 cloves of garlic, chopped; 1/2 teaspoon ground fennel (optional); 1 pinch red pepper flakes (to taste); 4 cups tomatoes, diced (or a 28 ounce can of diced tomatoes); 1/2 cup kalamata olives; 1/4 cup feta, crumbled; 2 tablespoons parsley, chopped; 1 tablespoon dill, chopped (optional); 1 tablespoon mint, chopped (optional)