Easy vegan gravy

Heat the miso paste in a saucepan with 800ml water. Whisk to dissolve, then bring to a simmer. Add a little more water if needed.

Mix the cornflour with 2 tsp water until smooth, then stir a little of the mixture into the miso. Let it bubble and thicken, stirring occasionally. If the gravy isn't thick enough, add an extra splash of the cornflour mixture.

For extra richness, add the nut butter (if using) to the mixture and stir well. Season to taste, then serve.