Francesca DiMarco spent the first 18 years of her life without ever trying a green vegetable. The self-described "pickiest eater ever" survived on macaroni and cheese, plain cheeseburgers, and Taco Bell tacos without any lettuce. She used to have nightmares that her grandfather would follow through on his threat to give her a suitcase full of grilled cheese sandwiches for her birthday. After high school, DiMarco traded the cold Colorado snow for Southern California sand. She (barely) supported herself by waitressing at an upscale seafood restaurant, and for the first time discovered the gastro...