To a shallow bowl crack the egg and whisk. Place the flour into another shallow bowl.
Slice the chicken breasts in half horizontally to make them thinner. Season on each side with salt and pepper.
Dredge each piece of chicken in the flour, dip into eggs, then coat in the breadcrumbs. Place on the sheet pan in a single layer.
Place the trimmed asparagus around the chicken, season with salt, pepper, and spray everything with olive oil spray. Bake for 20 minutes.
Flip the chicken and asparagus over. Place the zucchini discs around the asparagus and chicken on the sheet pan bake for an additional 5-8 minutes or until the chicken is cooked and the zucchini is tender. Enjoy