Ingredients

6 medium peaches (about 1 pounds, halved, pitted and thinly sliced)
1 cup blueberries
3 tablespoons plus one teaspoon granulated sugar, divided
teaspoon cinnamon
1 cup all-purpose flour
1/3 cup quick-cooking oats
1 teaspoon baking powder
teaspoon baking soda
teaspoon salt
3 tablespoons light butter
1 6-ounce container nonfat vanilla yogurt