Place a large saucepan over medium heat and add the vegan butter and vegetable oil. Once the vegan butter is melted, add the onion. Fry for around 10 minutes, stirring often until the onion is beginning to brown.
2 tablespoon vegan butter, 1 teaspoon vegetable oil, 1 onion
Add the garlic and bay leaves and fry for a further 2 minutes, stirring often.
2 cloves of garlic, 2 bay leaves
Add the plain white flour and stir to make sure all the pieces of onion are coated. Add around 100ml of the stock and stir well until a thick paste forms. Keep adding the stock little by little, stirring constantly.
4 tablespoon plain white flour, 700 ml mushroom stock
Once all the stock is added, reduce the heat to low and cook the gravy for a further 5 minutes, stirring constantly, or until the gravy has thickened to the desired consistency. Add the soy sauce then season to taste with salt and black pepper.
1 tablespoon dark soy sauce, Sea salt and black pepper to taste
Remove from the heat, pass the gravy through a sieve and serve or keep over a very low heat, stirring occasionally to keep warm.