Spoon 1 teaspoon of chopped nuts of choice (I love candied almonds) into the bottom of each ice-pop mold. Next, spoon or pour in some of the yogurt mixture. Add slices of banana, if using, on top of the yogurt mixture. Use the wooden popsicle stick to push the bananas down into the yogurt. You can add a little nuts at the top of the pop as well. Place a stick in the middle of each pop; freeze 2 hours or until firm.