Preheat your oven to 425°F.
On a plate, combine the almond flour, grated Parmesan, garlic powder, salt, and pepper.
In a shallow bowl, whisk the egg white until slightly frothy.
Dip the chicken breast first in the egg white, then coat evenly with the almond flour mixture.
Place the coated chicken on a baking sheet lined with parchment paper.
In a separate bowl, toss the broccoli, cherry tomatoes, and zucchini with a drizzle of olive oil (optional), salt, and pepper.
Arrange the vegetables around the chicken on the baking sheet.
Bake for 20-25 minutes until the chicken is cooked through and the coating is crispy, and vegetables are tender and slightly browned.
Let the dish cool slightly before serving.