4 chicken breasts, skinned, boned and halved
1/2 c. onions, sliced
1/2 to 1 c. sliced fresh mushrooms
1/2 c. low-sodium chicken broth
1/4 c. diet 7-Up
3/4 c. plain non-fat yogurt
2 tsp. grated lemon peel

Brown chicken breasts in a pan sprayed with Pam. Add and saute onions and mushrooms. Mix together broth, 7-Up, yogurt and lemon peel and pour over chicken. Bake in a 350 degree oven for 30 minutes.