Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the flour, garlic powder, and sea salt.
Add the non-fat Greek yogurt and liquid egg whites to the dry ingredients, stirring until a shaggy dough forms.
Turn the dough onto a lightly floured surface and knead for 2-3 minutes until smooth and elastic.
Divide the dough into 4 equal portions and roll each into a long rope shape, approximately 6 inches long.
Place the breadsticks on the prepared baking sheet.
In a small bowl, combine the olive oil, minced garlic, and Italian seasoning, then brush the mixture evenly over the breadsticks.
Sprinkle the grated Parmesan cheese over the top of each breadstick, pressing slightly so it adheres.
Bake for 12-15 minutes, or until the breadsticks are golden brown and firm to the touch.
While the breadsticks bake, warm the marinara sauce in a small saucepan or microwave-safe bowl.
Serve the warm breadsticks immediately with the marinara sauce for dipping.