Bring a large pot of salted water to a boil. Add potatoes and cook over medium heat until soft, 20 to 25 minutes. Drain well. Mash potatoes with butter, cheese, salt, and pepper. Refrigerate until cold.
Preheat oven to 400°F. In a skillet over medium heat, toast amaranth until browned, about 10 minutes, stirring frequently to prevent burning. Remove from the heat and set aside.
Add the flour to the chilled potatoes and mix until well combined. Divide the potato mixture into six equal portions. Roll each portion into a 7-inch rope. Roll each rope in toasted amaranth, then form into a donut shape. Place donuts on a lightly greased baking sheet, and bake 12 minutes.
Per Serving: Serving size: 1 donut, 290 calories (60 from fat), 7g total fat, 3.5g saturated fat, 15mg cholesterol, 270mg sodium, 48g carbohydrates, (6 g dietary fiber, 3g sugar), 9g protein.
Note: We've provided special diet and nutritional information for educational purposes. But remember — we're cooks, not doctors! You should follow the advice of your health-care provider. And since product formulations change, check product labels for the most recent ingredient information. See our Terms of Service.