6 skinless, boneless chicken breast halves
1 (3 ounce) package cream cheese, softened
2 cups sliced cooking onions
1 cup canned mushrooms
1 1/2 cups diced celery
1 tablespoon olive oil
1 teaspoon paprika
1 cup chicken broth
1 tablespoon vinegar
1 (4 pound) can tomato paste
1 chicken leg quarters
1 onion, sliced