Preheat oven to 400°F and line a baking sheet with parchment paper.
In a medium bowl, combine the ground chicken, grated parmesan cheese, egg, garlic powder, dried oregano, sea salt, and black pepper.
Mix the ingredients thoroughly until a uniform, dough-like paste forms.
Place the mixture onto the prepared baking sheet and flatten into a rectangle approximately 1/4-inch thick.
Bake for 18-20 minutes until the edges are golden brown and the center is firm to the touch.
While the breadsticks bake, warm the marinara sauce in a small saucepan over low heat until simmering.
Remove the tray from the oven and let the breadsticks rest for 5 minutes before slicing into 1-inch wide strips.
Garnish with finely chopped fresh parsley and serve immediately with the warm marinara sauce for dipping.