Oatmeal Shortcakes with Spiced Plums

Name: Oatmeal Shortcakes with Spiced Plums
Ingredients: 2 cups all purpose flour; 1/2 cup old-fashioned oats; 1/2 cup (packed) golden brown sugar; 1 tablespoon baking powder; 1/2 teaspoon salt; 1/2 cup chilled unsalted butter, cut into small pieces; 2/3 cup whole milk; 2 teaspoons sugar; 1 pound firm but ripe plums (about 6), halved, pitted, each cut into 4 wedges; 1/3 cup sugar; 2 teaspoons fresh lemon juice; 1/2 teaspoon ground ginger; 1/8 teaspoon ground cinnamon; 2 tablespoons unsalted butter; 3/4 cup chilled whipping cream; 2 tablespoons powdered sugar