Named Best Vegetarian Gravy online, I tried this for Thanksgiving, and it was actually really good. I had to leave out the shitake mushrooms, not because I didn't have them, but because the smell of rehydrated dry mushrooms was going to make me sick. The gravy was excellent without them. And I did use the Marmite - thank you, Amazon!
Portobello Vegan Beef(less) Stew....omit the oil if following plant-based, no oil eating plan. Not sure about the liquid smoke and marmite but people state that it is delicious without using either of those.