We've all been there - you're craving pie but you just don't have time to call in another favor from Grandma. Not to worry, just try this lightning-fast hack for banana cream pie. Bonus? 200 calories! Break a microwave-warmed coffee cake into pieces and press the softened bits in the bottom of a bowl. Then, toss together the yogurt, cinnamon and banana. Spoon it into the crust and dig in. Now call your nonna - it's been too long.