Mexican Chicken without sauce

7 cups chicken stock or low-sodium broth 2 cups water 4 chicken breast halves on the bone, with skin 1 pound tomatoes , husked and halved 1 small onion ,[...]

3/4 cup shredded reduced-fat monterey jack cheese 3 tablespoons low-fat mayonnaise 3 tablespoons nonfat sour cream 2 tablespoons chopped cilantro 1 tablespoon[...]

4 boneless chicken breasts , skinned 2 tablespoons lime juice 1 onion , chopped 2 garlic cloves , crushed 1 tablespoon olive oil 1/2 teaspoon ground cumin[...]