Preheat your oven to 400°F and line a baking sheet with parchment paper.
Slice the chicken breast into bite-sized pieces if desired, or leave as fillets for a classic presentation.
In a shallow bowl, whisk together the egg white. In another bowl, combine almond flour, garlic powder, salt, and pepper.
Dip each chicken piece in the egg white, then dredge in the almond flour mixture until well coated.
Place the coated chicken pieces on the prepared baking sheet.
Bake for 18-20 minutes, turning halfway if needed, until the chicken is cooked through and the coating is crisp.
While the chicken bakes, prepare the orange sauce by combining the fresh orange juice, orange zest, and a pinch of salt in a small saucepan. Warm over low heat for 3-4 minutes, stirring occasionally.
Once the chicken is ready, drizzle the warm orange sauce over the crispy chicken, or toss the chicken in the sauce for an even distribution of flavor.
Serve immediately and enjoy your zesty, healthful twist on orange chicken.