Add all marinade ingredients to a bowl and mix together until combined. Separate out ¼ cup of the marinade, this will be use for the salad.
Toss together marinade with chickpeas and chicken in a large bowl. Let marinate for at least 15 minutes. You can also do this the night before if desired.
Preheat oven to 425 degrees. Add chickpeas and chicken to a sheet pan lined with parchment paper. Roast for 30-35 minutes, until chicken thighs read 175 degrees or are cooked through.
Add cucumbers and tomatoes to a bowl and toss together with the reserved ¼ cup of the marinade. Set aside.
Add all yogurt sauce ingredients to a bowl and mix together until smooth.
Form bowls with cucumber salad, chicken thighs and chickpeas. Top with yogurt sauce and dig in.