Cherry Filling

2/3 cup sugar
2 tablespoons cornstarch
1/2 teaspoon ground cinnamon (or apple pie spice mix)
1/4 teaspoon ground nutmeg
Grated zest of 1 unsprayed lemon
4 cups pitted fresh tart cherries (about 2 pounds), or 2 -ounce bags frozen pitted cherries, thawed
2 tablespoons fresh lemon juice
3 tablespoons cold unsalted butter, cut into pieces

Biscuit Dough

1 cup unbleached all-purpose flour, white whole wheat flour, or whole wheat pastry flour
1/4 cup sugar
1 1/2 teaspoons baking powder
1/2 teaspoon salt
2 tablespoons unsalted butter, chilled and cut into small pieces
2/3 cup cold heavy cream or half-and-half, plus additional drops, if necessary
1 1/2 tablespoons unsalted butter, melted, for brushing
2 tablespoons sugar, for sprinkling