Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a shallow bowl, combine almond flour, grated Parmesan cheese, garlic powder, black pepper, and a pinch of salt.
In another bowl, lightly whisk the egg white.
Dip each chicken breast in the egg white, then coat evenly in the almond flour mixture.
Place the coated chicken on the baking sheet and bake for 20-25 minutes, or until the chicken is cooked through and the coating is crispy.
While the chicken bakes, toss the broccoli florets with olive oil, salt, and pepper, and spread them on a separate baking sheet.
Roast the broccoli in the oven for approximately 15 minutes, stirring halfway, until tender with crisp edges.
Once both the chicken and broccoli are done, plate the crispy Parmesan chicken alongside a serving of roasted broccoli and serve immediately.