Strawberry Pop-Tart Cobbler

Preheat oven to 375 degrees F. In a large bowl, toss strawberries with 1 tablespoon sugar and corn starch. Set aside. Butter a 9-x-13" baking dish and pour in strawberries, making an even layer. Make biscuit topping: In a large bowl, whisk together flour, remaining 1/2 cup sugar, baking powder, and salt. Add cubed butter and use your hands to work it into a dough. Add cream and work until sticky. Top strawberries all over with tablespoonfuls of dough. Brush dough with heavy cream. Bake until biscuit topping is golden and a toothpick inserted in the center comes out clean, 45 minutes to 1 hour. Let cool 30 minutes. When ready to serve, make icing: In a small bowl whisk together powdered sugar and milk until combined. Drizzle icing all over cobbler topping and sprinkle with sanding sugar. Serve.