I would highly suggest vegetarian food seekers to try out cuisines that have worked out vegetarian options over time (Indian / Thai) rather than the options that try to substitute a green salad. I also have a HUGE resistance for stuff like Beyond meats - When I want meat, I really don't want to try out synthetic haeme or whatever that makes this taste like meat - at least for the next 15-20 years when we figure out w…
The synthetic hemoglobin is Impossible's (patented) technique to make it cook like meat, because it's fake red blood cells. Long story short, it's a slightly differently different way to (kind of) ferment soy beans, and while it may not be as old as Soy Sauce, after as long as Asian cultures have been (ab)using the soy bean, Impossible's process would be quite hard pressed to find some new cancer to cause.
The rest is just mostly various combinations of plants (beans, plant fibers, spices), just as bean burgers and veggie burgers have always been.
Though don't let me stop your skepticism. Beyond / Impossible are useful beef substitutes and probably aren't healthier than beef, but they probably aren't any worse than beef either.