This easy chicken main is like a Greek gyro minus the pita. Serve with an easy Greek salad of chopped cucumbers, tomatoes, feta, and Kalamata olives dressed with lemon juice and olive oil for a complete meal.
In a bowl, mix together the yogurt, cucumber, red onion, dill, and lemon juice. Season with salt, to taste.
Preheat a gas grill or cast-iron grill pan on medium-high heat.
Coat the chicken with olive oil, oregano, basil, and lemon zest. Season with salt, to taste. Grill until grill marks appear and the internal temperature is 165 degrees, about 6-8 minutes per side. Serve with the tzatziki sauce on the side.