I modified this slightly from a recipe on a Stonyfield Farm yogurt container. When I made them the first time, I forgot the sugar, and that worked fine. The second time, I used vanilla flavored yogurt, which has plenty of sugar, and so left it out (and left out the vanilla too). But I include it here since muffins are supposed to be sweet, right?
1 cup white flour
1 cup whole wheat flour
1/2 cup sugar (optional)
1 1/2 tsp baking soda
1 cup plain yogurt, lowfat or regular
1/4 cup melted butter
1 tsp vanilla
1 cup chopped strawberries (fresh or frozen)
Mix eggs, yogurt, butter, and vanilla. In another bowl, mix flour, sugar and baking soda. Toss strawberries in the flour mixture, then add egg mixture and stir. Pour into greased muffin tins. Bake at 375 for 20-25 minutes. Makes 12 muffins.