In a bowl, mix all mashed potato ingredients together until smooth.
Cook burger steak according to package instructions. For the Quorn patties I simply many fried them until brown. I also sautéed some sliced button mushrooms with the burgers.
Heat a sauce a pan. Add in the oil. Place the veggie cube (if using)
Over low heat, add in the water. Then slowly add in the flour while mixing. Keep stirring until smooth.
Add in the soy sauce, garlic powder, and salt.
Let boil for 5-8 minutes on medium heat until thick. Season to taste.
On a plate, place the mashed potatoes burger patties, mushrooms, and then add in the gravy! Enjoy!