Solely the ginger is spicy enough for me, this dish sure keeps you warm haha. I'd love to have mushrooms, I don't know why they are so expensive here. Recently I traveled to a state in my country where they are produced and our guide explained that the production is huge, there is no need to sell it at that price, but it is treated as a luxury product to keep the price high. I don't know if that is exactly the case our guide doesn't work there, we were just visiting tourist places, but I think it is very possible...