I whisk together Greek yogurt, lemon juice, red wine vinegar, minced garlic, oregano, paprika, cumin, coriander, salt, pepper, optional cayenne, and olive oil until smooth. Then I toss the chicken tenderloins in, making sure each piece is well-coated. I cover and refrigerate—at minimum 30 minutes, or overnight if I have time—for best flavor.
While the chicken is soaking up the marinade, I chop the Greek salad vegetables: tomatoes, cucumber, bell peppers, red onion, olives, etc. I also make tzatziki: grate or finely chop cucumber (squeeze out water), mix with yogurt, garlic, a bit of white vinegar or lemon, fresh dill or mint, salt and pepper. If I prep them ahead, I keep components separate so textures stay fresh.
I heat a non-stick skillet over medium-high heat with a tablespoon of olive oil. I shake off excess marinade from chicken (so it browns instead of steams), then cook in a single layer. About 4-5 minutes on one side until well browned, then flip and another 5 minutes until internal temperature reaches 165°F (75°C) and juices run clear. If the pan is small, I cook in batches so chicken doesn’t overcrowd.
Once the chicken is cooked, I divide it into bowls (about 4-6), add a generous helping of Greek salad and tzatziki sauce, and include pita wedges if using. I serve immediately so the chicken is still warm and the salad and sauce are fresh. A final drizzle of olive oil or squeeze of lemon over the top enhances flavor.