Salt Solution Cioppino

Name: Salt Solution Cioppino
Ingredients: 1 tablespoon extra-virgin olive oil; 3 cloves garlic, minced; 1 medium onion, chopped; 1 medium red bell pepper, chopped; 1/2 medium fennel bulb, sliced; 1 teaspoon dried basil; teaspoon saffron threads, lightly crushed (optional); 3/4 cup white wine; 1/2 pound red-skinned potatoes, cut into 1 pieces; 1 can (14.5 ounces) no-salt-added diced tomatoes; 1 cup low-sodium chicken broth; 16 small mussels, scrubbed; 1/2 pound peeled and deveined medium shrimp; 1/2 pound skinless cod fillet, cut into 1 1/2 pieces