Slice the chicken breast into thin cutlets and pat them thoroughly dry with paper towels.
In a shallow bowl, whisk together the almond flour, garlic powder, onion powder, sea salt, and black pepper.
Dredge each chicken cutlet in the almond flour mixture, pressing firmly to ensure an even coating on both sides.
Heat the avocado oil in a large skillet over medium-high heat until it begins to shimmer.
Place the chicken in the skillet and sear for 3-4 minutes per side until the crust is golden brown and the chicken is cooked through.
During the last 2 minutes of cooking, add the asparagus spears to the pan, sautéing them until they are tender-crisp.
Remove the skillet from the heat and drizzle the fresh lemon juice and zest over the chicken and asparagus.
Garnish with chopped fresh parsley and serve immediately.