Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Place the chicken breast on a cutting board and, if necessary, pound it slightly for even thickness.
In a shallow bowl, whisk the egg white until slightly frothy.
In another shallow dish, combine the almond flour, garlic powder, salt, and pepper.
Dip the chicken breast first in the egg white, allowing excess to drip off, then coat it evenly in the almond flour mixture.
Arrange the coated chicken on the prepared baking sheet.
In a separate bowl, toss the cauliflower florets with fresh rosemary, thyme, a pinch of salt, and a drizzle of olive oil if desired.
Spread the cauliflower around the chicken on the baking sheet, ensuring even spacing for optimal roasting.
Bake in the preheated oven for about 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the cauliflower is tender and slightly golden.
Remove from the oven and let rest for a few minutes before serving.