Line a large sheet pan with foil. Wash and cut your vegetables and spread evenly on the pan. Place the chicken on a cutting board with plastic wrap on top. With a meat mallet, pound until the chicken is the same thickness all over. Remove the plastic wrap and place the chicken on the sheet pan.
Spray everything evenly with avocado oil spray. Sprinkle evenly with Everything Seasoning. Sprinkle lemon zest over chicken. Place 2 to 3 slices of lemon on each chicken breast.
Place the sheet pan in the oven and cook 25 minutes. Test chicken for doneness. Return to oven 5 more minutes if needed.