If you do not have an ice cream maker, you can still make this Blueberry Frozen Yogurt. After blueberries are cooked and cooled, add them along with the yogurt to a blander and quckly blend together until mixture is combined but some blueberries are still whole. Place in an air tight container in the freezer. Freeze for 4 hours (or overnight) or until yogurt is frozen. This will not be as creamy as using an ice cream maker but will still be good.