Perfect for breakfast-on-the-run or lunchbox treats. Makes 12 muffins Calories per muffin: 159 calories Total fat per muffin: 5.2 grams; 18 mg cholesterol Percent fat from calories: 29%  1 cup old-fashioned or quick-cooking oats, uncooked  1 cup all-purpose flour  1/2 cup firmly packed brown sugar  1 1/2 teaspoons baking powder  1/4 teaspoon ground nutmeg  3/4 cup buttermilk ...