Put the vegetables in the bottom of the crockpot, add the water and sprinkle half the seasoned salt on the vegetables. Place the chicken breasts on top and sprinkle with the other half of the seasoned salt. Cook on low for 6-8 hours.
Whisk together the milk and cornstarch until smooth, then pour into the stew and cook on high for about 15 minutes, until the broth has thickened. Add more liquid if it's too thick for you, then season with additional seasoned salt to taste.