Preheat oven to 400 degrees Fahrenheit
Line a cookie sheet with aluminium foil. Spray with cooking spray.
Combine the ground chicken, Parmesan cheese, breadcrumbs, eggs, salt, pepper and spices in a bowl. Use your hands to combine well.
Form 12 meatballs from mixture. They should be slightly bigger than a golf ball.
In a separate bowl, combine 1/2 cup marinara sauce and 2 tablespoons olive oil. Mix well. Add 1 tsp marinara sauce mixtures to the top of each meatball. Place in the preheated oven and bake for 15 minutes.
Add 1 tbsp marinara sauce to the top of each meatball and sprinkle with more parmesan cheese. Add one slice of mozzarella cheese.
Place back in the oven for 5-7 minutes, until cheese melts and starts to get golden brown.