Meet Impossible Foods' lab-grown veggie burger. It bleeds - CNET. There is nothing quite as tasty as a grilled hamburger on a bun with mayo, ketchup, lettuce, tomato and onions. Not only for vegans, the Impossible Foods' lab grown burgers have figured out how to make the veggie burger look and taste like the real thing. This interests me because, as a heart patient, my cardiologist has advised cutting back on red meat. The idea that an animal didn't have to die to feed me is also attractive. But, in a nod to our ancestors, I have always been a carnivore, and couldn't stomach the normal veggie burgers being sold. This burger may change my mind. Now, both I and my cardiologist will be happy.