Instructions: Preheat oven to 375 degrees.Place large size (14 X 20") oven cooking bag on large cookie sheet.In large bowl,coat blueberries with 3 tablespoons flour.Roll out pastry for bottom crust,fit into pan;sprinkle with 1 tablespoon sugar and remaining flour. Pour in blueberries;sprinkle with lemon juice and remaining sugar.Dot with butter.Add lattice top crust made with remaining pastry;slide pie into bag.Close bag with nylon tie;make 6 half-inch slits in top.Bake 1 hour or until syrup boils and crust is brown.

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