How does impossible meat taste like meat?

Online Answer
The Impossible Burger includes an ingredient from soybeans called leghemoglobin, which is a protein that is chemically bound to a non-protein molecule called heme that gives leghemoglobin its blood red color. ... Heme gives the Impossible Burger the appearance, cooking aroma and taste of beef.
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But there's one type of food that appears to be resilient to becoming overcooked: the mushroom. To test it out, Dan Souza, the executive editor of "Cook's Science" at America's Test Kitchen, pitted a piece of portobello mushroom against pieces of zucchini and beef tenderloin.
According to Impossible Foods, the protein in the company's burgers is made from soy and potatoes. There is fat from coconut and sunflower oils, and there are binders from methylcellulose and food starch, which help hold the meat together so that it can be made into patties, meatballs, or even kebabs.
It's easy to order the Impossible Whopper vegan—just ask for no mayonnaise! The patty used in the Impossible Whopper is the "Impossible Burger 2.0" made by Impossible Foods—and it's completely vegan.
Whereas the Impossible Burger is slightly lower in calories and fat, the Beyond Burger contains fewer carbs. Both have similar amounts of sodium and provide around 25% of the Daily Value (DV) of iron.
Yes, you can eat Impossible's "meat" totally raw. Honestly, it tastes pretty good uncooked. If you've ever eaten a terrine, or a Thai laab, or another type of chopped-meat dish, you'll be right at home eating Impossible's "meat" raw.