Slow Cooker Mondays - Potato Soup

When I woke up this morning to frost, I thought that a nice warm soup would be a good recipe for today.

8 potatoes, peeled and chopped
1 sweet onion, chopped
2 carrots, peeled and diced
1/2 tsp. dried rosemary
1 can chicken broth
2 Tbs. fresh, minced parsley
1 1/2 tsp. salt
1/4 tsp. ground pepper
1 C. 2% or skim milk
1/2 C. all-purpose flour

Toppings: sliced green onions, grated cheese, or crumbled bacon

Sauté the onion in a skillet with a little oil till tender. Add to the crockpot with the potatoes, carrots, rosemary, broth and parsley. Add water to about 2 inches from the top of the crock. Season with the salt and pepper. Cook on high for 8 hours. 1 hour before serving, put milk into a bowl. Add flour and whisk till combined. Add to the soup.