Place everything in a pressure cooker except the pepper. Cook under high pressure for 7 minutes. Quick-release the pressure and stir everything to combine. (The quinoa has a tendency to float to the bottom.) Serve warm with freshly milled pepper over the top. Note: If you don't have porcini mushrooms, any ol' dried mushroom will do. It won't taste nearly as luxurious though! You can also substitute 1/2 pound of fresh mushrooms. Note: If you don't have porcini mushrooms, any ol' dried mushroom will do. It won't taste nearly as luxurious though! You can also substitute 1/2 pound of fresh mushrooms. Variation: In the fall, try adding a bunch of chopped butternut squash before cooking.