Preheat oven to 200°C / 400°F.
Line a baking sheet with parchment paper and brush with neutral oil. Place chicken on baking sheet and season with salt. Set aside.
In a large bowl, combine lemon juice, honey, soy sauce, garlic, parsley, salt and black pepper. Pour ¾ of the mixture over chicken. Arrange lemon slices over top.
Cover chicken with foil and bake until the chicken is almost cooked through, about 15 minutes. Uncover and arrange asparagus around the chicken.
Pour remaining mixture over the asparagus; season the asparagus with salt and black pepper. Return to the oven and cook until the chicken reaches an internal temperature of 75°C / 165°F, and the asparagus is fork tender. Garnish with parsley. Serve.