These German "Zimt Sterne" are made with ground almonds instead of flour for a delicious gluten-free Christmas cookie. They're brushed with a shiny lemon glaze for a pretty finish.     Cinnamon Stars   Author: Robin Ingredients 2 2/3 cups finely ground almonds 1 tablespoon ground cinnamon 1 teaspoon lemon zest 1/3 cup egg whites