Healthy Blueberry Soup - cooking recipe

Ingredients

1 pint blueberries (I use frozen ones from Trader Joes)
2 cups water
1/4 cup sugar
1 tablespoon flour (or 1 tablespoon use 1 tsp. cornstarch mixed with a bit water)
2 slices lemon peel (must be organic, otherwise I use 1 T. lemon juice)
salt

Preparation

Place all the ingredients into a pan.
Bring to a boil, and boil for 1 or 2 minutes.
Cool.
Refrigerate overnight.