Seafood Linguine

Name: Seafood Linguine
Ingredients: 8 ounces whole-wheat linguine, or spaghetti; 1/2 teaspoon salt; 1/4 teaspoon freshly ground pepper; 1 tablespoon chopped fresh marjoram, or 1 teaspoon dried, plus more for garnish; 4 cloves garlic, chopped; 8 ounces dry sea scallops; 1/2 cup white wine; 8 ounces tilapia, or other flaky white fish, cut into 1-inch strips; 2 tablespoons extra-virgin olive oil; 1 tablespoon chopped shallot; 1 28-ounce can diced tomatoes, drained; 1/4 cup grated Parmesan cheese, (optional); 12 littleneck or small cherrystone clams, (about 1 pound), scrubbed