A verstatile rhubarb sauce that is good to keep in the refrigerator to whirl with fruit and milk or frozen yogurt for a fast breakfast on the run. Recipe for a Pick-a-Fruit Rhubarb milkshake, using this rhubarb base, is included. Delicious with the strawberry option and the ice cream addition for a thick shake. Edited with twissis' excellent tips: The base mix cooks down to a volume of about 3 cups which would provide 6 servings. For each shake use 1/2 cup base mix, 3/4 cup strawberries or other fruit, and 1/2 cup ice cream (no milk). Thanks to Twissis for these refined directions for using the base mix.