Manhattan Cod Chowder

Name: Manhattan Cod Chowder
Ingredients: 4 cod fillets about 1 1/2 pounds, thawed; 3 cups yams, peeled & cubed; 1 cup white onion, diced; 1 cup celery, diced; 2 tablespoons minced garlic; 2 tablespoons extra virgin olive oil; 1 cup water; 3 cups vegetable broth; 2 tablespoons tomato paste; 1 1/2 cups diced tomatoes; 1/4 teaspoon salt; 1/2 teaspoon pepper; 1 1/2 teaspoons thyme