In a mixing bowl, combine Greek yogurt, olive oil, fresh lemon juice, lemon zest, minced garlic, dried oregano, salt, and black pepper. Whisk until smooth and well-blended.

Add the chicken tenders into the marinade, ensuring they are fully coated. Cover and refrigerate for at least 30 minutes, or up to 2 hours for enhanced flavor.

Heat your grill pan over medium heat or preheat your oven to 400°F (200°C) so everything is ready to go when your chicken is marinated.

For Grilling: Cook the tenders for 5-7 minutes on each side until they are golden brown and cooked through.

For Baking: Arrange the marinated tenders on a parchment-lined tray and bake for 20-25 minutes until fully cooked.

Remove the cooked chicken from the heat and let it rest for a few minutes. Garnish with fresh parsley or dill just before serving.