More than one in 10 Americans identify as vegan, vegetarian or pescatarian, according to YouGov data, while 15 percent identify as flexitarian (someone who normally eats a vegetarian diet but occasionally eats meat). That might seem like a small part of the market, but nearly seven in 10 Americans (69 percent) say they make an effort to eat enough fruits and vegetables, so demand is high.

But it’s not just about eating more vegetables. It’s also about eating less meat.

YouGov data shows two in five (40 percent) of Americans are considering reducing their meat and dairy intake while a quarter (25%) sometimes feel guilty when consuming meat and dairy products.

Enter: Meatless meat.

Burger King—which also scores high on our list of restaurants with high quality scores among non-meat-eaters—is leveraging its perception of quality among vegetarians and vegans, offering its Impossible Whopper burger nationwide.

While not known for its depth of vegetarian options, KFC is the latest quick-service brand to dabble in meatless meat, testing Beyond Fried Chicken in tennessee and North Carolina.

In fact, nearly every fast-food brand on our list—Qdoba ,Taco Bell, In-N-Out, White Castle—are at least testing meatless meat offerings.

McDonald’s has been slower to enter the plant-based protein craze, but it is testing a Beyond Meat burger in a small pocket of Southwestern Ontario in Canada.

While Wendy’s doesn’t offer a faux-meat sandwich, it’s a long-time player in the entree salad game. It re-introducing the entrée salads in 2002 after first rolled out an industry-first salad bar in 1979.

What do we know about America’s vegetarians and vegans? YouGov data tells us they’re most likely to be male, age 18-29 and are much more likely to order in or get take out on a regular basis. While half of vegetarians and vegans eat fast food once a week or less, they are much more likely than U.S. adults to eat fast food more than once a day.