3 cups full-bodied red wine
1 1/2 cups sugar
4 to 5 (1-inch wide, 3-inches long) strips orange peel
1/4 cup orange-flavored liqueur (recommended: Grand Marnier)
1 1/2 cups sour cream, refrigerated
1/4 cup confectioners' sugar, plus more for dusting
2 pints fresh strawberries