Speedy Potato Soup

1 Tbsp. minced onion
1 Tbsp. flour
2 Tbsp. margarine
2 c. diced and peeled potatoes
1 Tbsp. parsley
1/2 tsp. salt
pepper to taste
2 c. hot water
2 c. milk

Cook onion in margarine until soft. Add flour and blend well. Add potatoes, salt and pepper, parsley and water. Cover and simmer until potatoes are done (about 20-25 minutes). Add milk.