Preheat your oven to 400 degrees.
Cut 6-7 slits (crosswise) into each chicken breast.
Carefully transfer the chicken to a cookie sheet.
Stuff each slit with your lemon and veggies in any order you like. You may use as much or as little veggies as you desire. Season each stuffed chicken breast generously with olive oil, salt, and pepper.
Surround the stuffed chicken with the diced potatoes and leftover lemon and vegetables (optional). Season the potatoes, lemon, and vegetables with olive oil, salt, and pepper.
Top the chicken and potatoes with fresh dill.
Transfer the cookie sheet to the oven and cook for 20-25 minutes or until the chicken is fully cooked. Once the chicken is cooked I sprinkle some parmesan cheese on top and let it rest for 5-10 minutes before serving.