In a small pot on medium heat: add the olive oil, flour, porcini mushroom powder, garlic and onion powder. Stir well to combine, and cook for a couple of minutes.
Slowly incorporate the vegetable stock, stirring vigorously to remove any clumps. Bring the mixture to a soft boil until the gravy thickens.
Stir in the tamari. Remove from the heat and allow to cool down for 5 minutes before serving.
Notes
To make dry mushroom powder, add the dried mushrooms to a small blender and process until they reach a powder-like consistency.Choose a low-sodium broth if mindful of your sodium consumption. The gravy is best served immediately. To save time on the big day, I like to gather all the dry ingredients in a jar the day before.If you do have leftovers, reheat on the stove in a small pot over low heat. Add a splash of boiling water while stirring vigorously to restore it to a nice, pourable consistency. Do not reheat it in the microwave, I tried and it was very bad 😂