Moroccan Fish Tagine for Two

Name: Moroccan Fish Tagine for Two
Ingredients: 12 ounces skinless cod fillets (1 to 1½ inches thick), cut into 1½- to 2-inch pieces; 1/2 teaspoon table salt , divided; 1/4 cup fresh cilantro leaves , plus 2 tablespoons chopped; 2 garlic cloves , peeled; 3/4 teaspoon ground cumin; 3/4 teaspoon paprika; 1/8 teaspoon cayenne pepper; 2 teaspoons lemon juice; 3 tablespoons extra-virgin olive oil , divided; 1/2 onion , sliced through root end ¼ inch thick; 1/2 green bell pepper , cut into ¼-inch strips; 1 small carrot , peeled and sliced on bias ¼ inch thick; 3/4 cup canned diced tomatoes; 3 tablespoons pitted green olives , quartered lengthwise; 1 tablespoon finely chopped preserved lemon