Instructions

1. Place the cashews in a small bowl and cover with 1 cup water. Set aside to soak for 30 minutes.
2. Place the potatoes in a large saucepan and add cold water to cover. Bring to a boil over high heat, then reduce the heat to medium and cook until the potatoes are very tender when pierced with the tip of a sharp knife, about 20 minutes. Drain thoroughly and set aside to cool.
3. Meanwhile, in a saucepan, combine the rice, mushrooms, and vegetable broth. Bring to a boil over medium-high heat, then reduce the heat to medium and simmer until the mushrooms are tender, about 10 minutes. Remove from the heat and let cool slightly. Carefully transfer the mixture to a blender or food processor and blend until smooth. (Alternatively, leave the mixture in the pan and use an immersion blender to blend until smooth.)
4. If necessary, return the mixture to the pan. Add the sage, marjoram, thyme, garlic, lime juice, ⅛ teaspoon of the pepper, and salt to taste. Cook over medium heat for 10 minutes to blend the flavors. Cover to keep the gravy warm and set aside.
5. Transfer the cashews and their soaking water to a clean blender. Add a pinch of salt and the remaining ¼ teaspoon pepper and blend until smooth. Pour the cashew cream over the potatoes and use a potato masher or handheld electric mixer to mash well. Taste and adjust the seasoning.
6. Serve the mashed potatoes topped with the gravy.