Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
In a small bowl, whisk together the almond flour, lemon zest, dried oregano, garlic powder, sea salt, and black pepper.
Pat the chicken breast dry with a paper towel, then brush the top with 0.5 tablespoon of avocado oil.
Press the almond flour mixture firmly onto the oiled side of the chicken to create an even crust.
Trim the woody ends off the asparagus and place them on the other side of the sheet pan.
Drizzle the asparagus with the remaining 0.5 tablespoon of avocado oil and the lemon juice, tossing to coat.
Place the chicken on the sheet pan and bake for 18 to 22 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender-crisp.
Let the chicken rest for 5 minutes before serving to ensure it remains juicy.