Chinese Lemon Chicken

4 large boneless skinless chicken breast halves
1 egg white
1 teaspoon water
1/4 cup all-purpose flour
1 teaspoon baking soda
1/4 cayenne pepper (1/2 tsp if you like spicier)
cooking spray
1/2 lemon, cut into thin slices
1 green onion, chopped (about 1 Tbls)
1.Cut each chicken breast half lengthwise. Mix egg white and water in a medium glass or plastic bowl. Add chicken; turn to coat both sides and let stand 10 minutes.
2.Heat oven to 450 degrees. Spray nonstick cookie sheet with cooking spray. Remove chicken from egg mixture; discard egg mixture. Mix flour, baking soda and red pepper in a large resealable plastic bag. Add 1 chicken piece at a time. Seal bag; shake to coat chicken. Place chicken on cookie sheet; spray with cooking spray about 5 seconds or until surface of chicken appears moist.
3.Bake uncovered for 20 to 25 minutes or until juice of chicken is no longer pink when centers of thickest pieces are cut. While chicken is baking, prepare Chinese Lemon Sauce. Let chicken stand 5 minutes;slice each piece into 5 slices. Pour sauce over chicken. Garnish with lemon slices and green onion.

Sauce:

3 tablespoons lemon juice
2 teaspoons sugar
5 tablespoons water
1 teaspoon corn starch
Pinch of salt, or to taste

Add all the ingredients in the Sauce into a small sauce pan and bring it to a quick boil. Transfer the fried chicken into the sauce, stir to coat well with the lemon sauce.