Instructions: Preheat oven to 350F.
Combine first 4 ingredients in a bowl; cut in margarine with a pastry blender or 2 knives until mixture resembles coarse meal. Set aside.

Combine peaches and blueberries in a 2-quart casserole, and sprinkle granulated sugar evenly over fruit. Crumble oat mixture evenly over fruit.

Bake at 350? for 45 minutes or until cobbler is bubbly. top cobbler with frozen yogurt, if desired.

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