In a mixing bowl, add half the yogurt, 1 clove chopped garlic, juice from 1 lemon, the oregano, half the fresh dill, half the olive oil, salt and pepper, and mix to combine.
Add the cut-up chicken and toss, marinate overnight.
When you are ready, you can either grill the chicken on an outdoor grill, or roast it at 375 for 15-20 minutes or until the edges are crispy.
To assemble, skewer the cooked chicken, three pieces at a time.
Slice three of the cucumbers on a thin setting on a mandolin.
Weave a slice on the skewer and press gently until it’s touching the chicken, then add three pieces more chicken.
Continue this pattern until the skewer is full, then add a cherry tomato to each side.
For the Tzaziki Sauce:
Grate the remaining three cucumbers and squeeze out as much water as possible.
Add it to a mixing bowl along with the rest of the yogurt, garlic, lemon juice, dill, olive oil, salt, and pepper.
Allow to sit in the refrigerator for 15 minutes (at least) before serving with the chicken skewers.