Since they are only available in restaurants (until March 2019), this may have something to do with the preparation method used. I've read in reviews of the product that if you overcook it, such that all the pink color in the middle of the patty is eliminated, it does not taste as good.

I've had it in burger patty form on a bun with lettuce, tomato, pickles, ketchup, mustard, and mayo. I've also had it crumbled up in vegan lasagna. Both ways tasted great.