Mussels in Cream Sauce, Garlic, and Lemon

Name: Mussels in Cream Sauce, Garlic, and Lemon
Prep time: 12 min
Cook time: 18 min
Total time: 30 min
Cuisine: American, French
Ingredients: 1 lemon; 3 tablespoons unsalted butter; 5 cloves garlic (peeled and finely minced); 2 shallots (peeled and finely chopped); Salt and black pepper; 1 tablespoon all-purpose flour; 1/2 cup clam juice (or seafood stock); 1 teaspoon dijon mustard; 1 cup heavy cream; 2 pounds mussels (cleaned (rinsed and debearded)); A handful of parsley (finely minced); 1/2 french baguette (sliced and toasted in butter, for serving)