Chicken and Dumplings

1 lb boneless skinless chicken breasts, cut in to cubes
1 lb frozen vegetables of choice
1 med onion chopped
2 jars (12 oz) chicken broth
1 1/2 cups low fat buttermilk biscuit mix

Combine chicken, vegetables, onion, and chicken broth (reserve 1/2 c plus 1 tbsp of broth) in slow cooker. Cover. Cook on high 2 hours. Mix biscuit mix with reserved broth until moistened. Drop by tablespoonfuls over hot chicken and vegetables. Cover. Cook on high 10 mins. Uncover and cook on high 20 mins longer.