Honduran Coconut Seafood Soup

Name: Honduran Coconut Seafood Soup
Cuisine: American, Latin American, Caribbean
Ingredients: 2 tablespoons vegetable oil; 1 medium onion, finely chopped; 1 red bell pepper, diced; 4 garlic cloves, minced; 1 teaspoon achiote powder (or paprika); 2 teaspoons ground cumin; 1 teaspoon dried oregano; 4 cups fish or seafood stock; 1 can (14 oz) coconut milk; For the seafood; 1 lb shrimp, peeled and deveined; 1 lb mussels or clams, cleaned; 1 lb white fish fillet (e.g., snapper or cod), cut into chunks; 1 teaspoon salt; 1 teaspoon black pepper; 2 green plantains, peeled and sliced into rounds; 2 medium potatoes, peeled and cubed; 1 ear of corn, cut into 4 pieces; Fresh cilantro, chopped; Lime wedges; Steamed white rice (optional); Warm tortillas (optional)