Consider this the case for bringing back this old-fashioned dessert.Credit: Grant WebsterYou may know Jennifer Garner from one of her award-winning films, like Dallas Buyers Club, Juno, and 13 Going on 30, or as the founder of baby food company Once Upon a Farm, but you may not know that she's also a cooking show host. The award-winning actress hosts her very own cooking series, called Pretend Cooking Show, on her Instagram. It's a silly, fun, a…