When I first became vegan, I craved meat & potatoes and gravy, this craving is the inspiration for this recipe. The gravy has a rich lemon and thyme flavor that compliments the vegan griller (burger) patties. I use Morningstar; I find they have a texture similar to meatloaf after simmering. I use cremini mushroom because I enjoy the meaty woodsy flavor of them over button mushrooms, and they give the gravy a nice dark color. But, you can use the mushroom of your choice. I would serve this gravy with a side of mash potaotes, but you could also serve with yams.