Oyster mushrooms on bread, you probably see it on lunch menus from time to time. Now if you want to make a feast of your lunch at home, this is a simple recipe that you can have ready in no time. It's just the way to turn your home-office into a luxurious canteen! The umami sauce in this recipe completes the flavour. The umami sauce adds to the umami of the mushrooms, which goes perfectly with the protein bread (or whatever bread you choose to accompany it) and the hummus and red cabbage.