PreparationMake filling: Preheat oven to 400°F with rack in middle. Butter a 3-qt glass or ceramic baking dish. Toss together filling ingredients in a large bowl. Spread out in baking dish and bake until just bubbling, 10 to 20 minutes. Make topping while filling bakes: Whisk together flour, cornmeal, baking powder, and salt, then blend in butter with your fingertips or a pastry blender until mixture resembles coarse meal. Add 1 cup cream and stir just until a dough forms. Turn out dough onto a lightly floured surface and lightly dust with flour, then roll out with a floured rolling pin into a 1/2-inch-thick round (about 10 inches in diameter). Cut out biscuits with lightly floured cutter. If necessary, gather scraps and reroll once, then cut out more biscuits. Arrange biscuits 1/2 inch apart over hot filling. Brush tops with remaining Tbsp cream, then sprinkle with sugar. Bake until topping is golden and fruit is bubbling in center, 25 to 30 minutes. Cool to warm, 30 minutes.
PreparationMake filling: Preheat oven to 400°F with rack in middle. Butter a 3-qt glass or ceramic baking dish. Toss together filling ingredients in a large bowl. Spread out in baking dish and bake until just bubbling, 10 to 20 minutes. Make topping while filling bakes: Whisk together flour, cornmeal, baking powder, and salt, then blend in butter with your fingertips or a pastry blender until mixture resembles coarse meal. Add 1 cup cream and stir just until a dough forms. Turn out dough onto a lightly floured surface and lightly dust with flour, then roll out with a floured rolling pin into a 1/2-inch-thick round (about 10 inches in diameter). Cut out biscuits with lightly floured cutter. If necessary, gather scraps and reroll once, then cut out more biscuits. Arrange biscuits 1/2 inch apart over hot filling. Brush tops with remaining Tbsp cream, then sprinkle with sugar. Bake until topping is golden and fruit is bubbling in center, 25 to 30 minutes. Cool to warm, 30 minutes.