Preheat oven to 350F. Butterfly chicken breast (cut in half horizontally but not all the way through).
Divide cream cheese and cheddar cheese inside each chicken breast. Bring the top over to close and secure with a toothpick.
Crack and whisk egg in a shallow bowl. Add grated parmesan cheese to another shallow bowl.
Cover each chicken breast with egg mixture, then with cheese. Add to a baking pan (sprayed with cooking spray or olive oil).
Once all chicken pieces are put in the dish, use a garlic press to add garlic over the chicken. Then squirt lemon juice all over chicken. Bake for 25 minutes or until internal temperature reads 165F.