These tender balls of buckwheat and sweet potato with tomato sauce will be the star of your lunch box or your Friday night dinners. They’re low in fat, rich in prebiotic carbohydrates and very very succulent. Trust us, we don’t toss that word around lightly. Besides, they are so easy to make that, if you want, you can eat them every week.A tip: prepare the balls and freeze them directly after cooking them in the pan. Every time you want to eat this comfort recipe, take the balls out of the freezer and heat them directly with the sauce.