1. In a medium saucepan set over high heat, combine the quinoa with the water and bring to a boil. Once boiling, reduce the heat, cover and simmer until at least half of the quinoa blooms (the white germ pops from the grain), about 8 minutes. Strain the quinoa through a fine-mesh strainer and spread the grains onto a baking sheet in a thin layer. Set aside to cool to room temperature.

2. In a medium skillet set over medium-high heat, warm 1 tablespoon of the olive oil and add the Maitake mushrooms. Cook until softened and lightly browned, about 4 minutes. Add the shiitake mushrooms and reserved quinoa to the pan and stir to toss. Warm for 1 minute, then transfer the mixture to a medium mixing bowl.

3. Add the dill, parsley, onion, apple and Parmesan to the quinoa mixture and toss to mix. In a small bowl, whisk together the sherry vinegar and the remaining 3 tablespoons olive oil. Season liberally with salt and pepper, and add to the quinoa. Serve warm.