For the absolute best results, allow the margarine, yogurt, and eggs to come to room temperature before you begin. If they are too cold, they will prevent the batter from being as smooth as it should be, and that's especially true for the eggs. In fact, whenever you come across a recipe that calls for eggs to be at room temperature, do just that. Here, the batter is topped with sliced almonds before baking, and the cake is a lovely option for brunch.