I put several recipes together to come up with this. (Why is it so difficult to find recipes for nonfat frozen yogurt?) It isn't terribly sweet (which is what I wanted), and the texture seems to stay quite good. I used frozen wild blueberries. A 1-cup serving is 3 WW points. Note that the nutritional information on Recipezaar may not be right; the database may use full-fat values for evaporated milk. My figures show that 1 cup is 150 calories, 0 grams of fat, 2 grams of fiber.