Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
In a medium mixing bowl, stir together the Greek yogurt, white whole wheat flour, half of the liquid egg whites, nutritional yeast, baking powder, and sea salt until a shaggy dough forms.
Turn the dough onto a lightly floured surface and knead for about 2 minutes until the texture is smooth and slightly elastic.
Divide the dough into 4 equal portions and roll each one into a long rope approximately 8 inches in length.
Arrange the breadsticks on the prepared baking sheet and brush the tops generously with the remaining liquid egg whites.
Evenly sprinkle the garlic powder and finely grated Parmesan cheese over the top of each breadstick.
Bake for 12 to 15 minutes or until the breadsticks are puffed, golden brown, and firm to the touch.
While the breadsticks bake, warm the marinara sauce in a small saucepan over low heat with the olive oil, minced fresh garlic, and dried oregano.
Remove the breadsticks from the oven and serve immediately while warm alongside the savory herb-infused marinara dipping sauce.