Oatmeal Cookie Cobbler

Preheat the oven to 350°F.

For the filling: Place the peaches in a 3-quart baking dish. Sprinkle with the sugar and cornstarch. Toss to combine. Bake for 35 minutes.

Meanwhile for the topping: In medium bowl whisk together the flour, cinnamon, baking soda, and salt. In a large bowl, beat the butter and sugars with an electric mixer on medium-high speed until pale and fluffy, about 3 minutes. Reduce the speed to medium and add the egg yolk; beat until smooth. Reduce the speed to low and gradually add the flour mixture, then the oats and nuts.

Drop 12 mounds of dough, about 2 Tbs. each, on the hot peaches. Return to the oven and bake until the cookies are golden brown and the peaches are bubbling, about 25 minutes. Serve warm or at room temperature.