Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
In a shallow dish, whisk together the almond flour, dried thyme, dried rosemary, garlic powder, sea salt, and black pepper.
Pat the chicken breast dry with a paper towel, then dredge it in the almond flour mixture, pressing firmly so the coating adheres to both sides.
Heat half of the olive oil in a large oven-safe skillet over medium-high heat and sear the chicken for 3 minutes per side until a golden crust forms.
On the prepared baking sheet, toss the asparagus spears with the remaining olive oil and the fresh lemon zest until evenly coated.
Transfer the skillet with the chicken and the baking sheet with the asparagus into the oven to roast simultaneously.
Cook for 10 to 12 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender yet vibrant.
Remove from the oven and drizzle the fresh lemon juice over the chicken and asparagus before serving immediately.