I presume this is only for the US Burger King? Although there are perfectly fine plant-based alternatives available in the Netherlands, after all the hype about the Impossible and Beyond burgers on HN I'm curious to give either a try.
Edit: Found a different article [1] that says:
> Burger King is giving the Impossible Burger a trial run in 59 restaurants in the St. Louis area, and if that goes well, the fast-food chain will make the product available in all its 7,200 branches across the US
[1] https://www.vox.com/future-perfect/2019/4/1/18290762/burger-...