Combine peanut butter and yogurt, stirring until smooth. Drizzle juice over bananas; toss gently to coat.
Spread about 3 tablespoons peanut butter mixture over each tortilla, leaving a 1/2-inch border. Arrange about 1/3 cup banana slices in a single layer over peanut butter mixture. Combine wheat germ and cinnamon; sprinkle evenly over banana slices. Roll up. Slice each roll into 6 pieces.
Delicious! I didn't have wheat germ, so I crushed up some corn flakes and mixed that with the cinnamon. This recipe started out as something I'd like to make for my kids, but I'll probably end up making it just for myself sometimes.