Place the chicken tenders into a ziplock bag, or sealable container and add in dried oregano, 2 Tbsps oil, and sea salt and pepper. Combine well to coat your chicken, then refrigerate for at least 30 minutes to overnight.
Heat a large non-stick grill pan over medium heat. Cook the chicken for 3-4 minutes on each side, or just until nicely charred and cooked through.
Set aside on a plate and once cool enough to handle tear it, shred it, or chop it into small bite-sized pieces.
In a large bowl add chicken, tomatoes, cucumbers, bell pepper, olives and onion as shown.
Sprinkle with crumbled cheese and season with sea salt and freshly ground pepper to your taste.
Drizzle with remaining oil and vinegar.
Gently toss to combine and enjoy!