Wild Mushroom Broken Spaghetti Risotto with Arugula and Hazelnuts

Name: Wild Mushroom Broken Spaghetti Risotto with Arugula and Hazelnuts
Ingredients: 1 package dried mixed wild mushrooms or porcini mushrooms; 1 quart chicken stock; 2 cups water; 3 tablespoons extra-virgin olive oil, plus a drizzle; 1 medium onion, finely chopped; 2 large cloves garlic, grated or finely chopped; Salt and freshly ground black pepper; 1 pound spaghetti, broken into small pieces; 1/2 cup dry white wine; 3/4 cup hazelnuts; 2 tablespoons butter; 3/4 cup Parmigiano-Reggiano, a few handfuls; 4 cups arugula; 1/2 lemon, juiced