In a bowl, mix together the ground chicken, shredded zucchini, egg, chopped onion, parsley, minced garlic, breadcrumbs, and seasonings along with olive oil until well combined.
Spread the mixture evenly onto a metal pan.
Shape the mixture into kebabs and use a spatula to create indents on each kebab.
Bake in the oven for 25 minutes until cooked through.
Serve the kebabs with sadiki, diced tomatoes, additional onion, and parsley.
