French in a Flash: Creamy Saffron Mussel and Spinach Pasta Recipe

Name: French in a Flash: Creamy Saffron Mussel and Spinach Pasta Recipe
Ingredients: 2 pounds mussels; Kosher salt; 1 pound casarecce pasta (fusilli is a good substitute); 4 ounces baby spinach, roughly chopped; 1 tablespoon olive oil; 1 tablespoon unsalted butter; 1 1/2 very large shallots, sliced (or 3 small shallots, about 1/4 cup total); 2 cloves garlic, thinly sliced; Freshly cracked black pepper; 1/4 cup dry white wine; 1/2 cup low-sodium chicken stock, preferably organic; 3/4 teaspoon saffron; 1/4 cup heavy cream