Mushrooms fleshy texture and distinct taste make for a pleasant meat substitute and the perfect ingredient for a vegetarian biryani. This simple mushroom biryani is composed of rice steamed over a duet of porcini and oyster mushrooms simmered in biryani spice and coconut milk. It is simple enough to make as a weekday spicy treat or as a celebratory weekend dish. Use a combination of different mushrooms for added flavour and texture. Apart from their unique taste, mushrooms also have nutritional benefits. White button mushrooms (Agaricus bisporus) in particular are one of the only non-meat produce with a high vitamin D content, another good reason to eat more mushrooms.