Preheat your oven to 425°F. Line a baking sheet with parchment paper.
In a small bowl, whisk together the freshly squeezed orange juice, cornstarch, garlic powder, salt, and pepper until smooth.
Place the chicken breast on a cutting board and pat dry. Brush the chicken with part of the orange mixture.
Dredge the chicken lightly in almond flour, ensuring an even coating. Place the coated chicken onto the prepared baking sheet.
Pour the remaining orange mixture over the chicken to infuse flavor.
Toss the broccoli florets with a few sprays of olive oil and a pinch of salt, then arrange them on the baking sheet around the chicken.
Bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through with an internal temperature of 165°F and the broccoli is tender with slightly crispy edges.
Optional: For an extra crisp, switch the oven to broil for the last 2-3 minutes, watching closely to avoid burning.
Remove from the oven, let rest for a few minutes, and serve your Crispy Baked Orange Chicken with Roasted Broccoli hot.