When you think of devouring your burger, you're likely picturing sinking your teeth into a juicy all-beef patty with all the fixings. You probably have scoffed at the thought of vegetarian or tofu burgers. However, the stereotype of bland, cardboard tasting fake meat burgers is being dissolved away.In fact, many chains are giving veggie burgers a chance on their menus, creating not only healthy alternatives but tasty too, for both omnivores and carnivores alike.Burger behemoth Red Robin has a veggie burger -- so does Johnny Rockets and even fast-food giant, Burger King. What's fueling so many restaurants to hop on the veggie bandwagon?It's a way to cater to the growing consumer segment called "flexetarians" -- a term to describe those who are not 100% vegetarian, but looking for meatless options whenever they can.Some operators like Burger King and Red Robin use premade vegetable patties but some have their own special in-house recipes. The Wynn Resorts, for instance, plan to introduce a veggie burger made of soy, quinoa, wheat protein and pea blends.Additionally, LYFE Kitchen, the new up-and-coming socially conscious healthy fast-food chain in which Synergy was hand-picked by Mike Roberts (former president of McDonald's) and the team to help bring the concept to life, aims take beloved menu items like burgers and transform them into truly healthy meals as well. While collaborating with the LYFE Kitchen team and chefs, we developed a spectacular menu that also includes vegetarian and vegan options.Keep your eye out on more beef-less burgers as the demand for vegetarian options is growing