Preheat your oven to 400°F.
Season the chicken breast with salt and pepper.
In a shallow bowl, whisk the egg white. In another shallow dish, place the whole wheat breadcrumbs.
Dip the chicken breast first into the egg white, ensuring it is fully coated, then dredge in the breadcrumbs to form a light coating.
Place the breaded chicken breast on a baking sheet lined with parchment paper and bake for 20-25 minutes until the chicken is cooked through and the coating is crispy.
While the chicken bakes, prepare the fresh slaw by combining shredded cabbage and grated carrot in a bowl. Add the Greek yogurt, lemon juice, salt, and pepper and toss well.
Toast the whole grain bun lightly if desired.
Once the chicken is done, assemble the sandwich by placing the crispy chicken on the bottom half of the bun, topping with a generous portion of the fresh slaw, and then capping with the other half of the bun.
Serve immediately and enjoy your healthy, crispy baked chicken sandwich with fresh slaw.