Preheat your oven to 425°F and line a large baking sheet with parchment paper.
Slice the zucchini into even spears, roughly 3 to 4 inches in length.
In a shallow bowl, whisk the egg white until it becomes slightly frothy.
In a separate shallow dish, combine the Parmesan cheese, almond flour, garlic powder, dried oregano, sea salt, and black pepper.
Dip each zucchini spear into the egg white, then roll it in the Parmesan mixture until it is thoroughly and evenly coated.
Arrange the spears on the prepared baking sheet in a single layer and bake for 15 to 18 minutes until the crust is golden and crispy.
While the zucchini is roasting, season the chicken breast with a pinch of salt and pepper and grill over medium heat for about 6 minutes per side until fully cooked.
Warm the marinara sauce in a small saucepan or microwave-safe bowl.
Slice the grilled chicken and serve it alongside the crispy zucchini spears with the warm marinara for dipping.