Place chicken in a large bowl or ziplock bag.
To make the marinade, whisk together all the ingredients until combined. Reserve a couple tablespoons of the marinade and pour the rest over top of chicken until completely coated. Seal the bag or cover and marinate chicken in the fridge for at least 30 minutes or up to 4 hours.
Pre-heat grill or grill pan on medium-high heat, making sure to lightly spray with oil to avoid sticking. If using wooden skewers, make sure to soak them in cold water for 15 to 20 minutes to prevent them from burning on the grill. Or you could use these metal skewers.
To assemble the kabobs, first layer on an onion slice, followed by some chicken, a zucchini slice, then a cherry tomato. Then just repeat these layers until you get to the end of the skewer and discard the marinade used for the chicken.
Place the skewers on the grill pan and cook them about 5 to 6 minutes on each side, brushing with the reserved marinade until the chicken is cooked through. The internal temp should read 165 degrees F.
To make the tzatziki sauce, mix together the yogurt, grated cucumber (make sure to squeeze out all the water so the dip doesn’t get watery), lemon juice, olive oil, garlic and fresh herbs. I also like to season with salt/pepper and top with fresh dill.
Serve the kabobs with tzatziki sauce and enjoy!
