Coconut Conch Chowder

Name: Coconut Conch Chowder
Ingredients: 1 pound conch meat; 0.25 cup margarine, divided; 2 green onions, chopped; 1 carrot, diced; 1 stalk celery, diced; 1 small sweet potato, peeled and diced; 1 small red bell pepper, diced; 0.5 cup fresh corn kernels; 2 tablespoons all-purpose flour; 1 quart half-and-half; 1 (14 ounce) can unsweetened coconut milk; 2 cups fish stock; 1.5 tablespoons grated fresh ginger root; salt and pepper to taste; 1.5 teaspoons hot sauce; 1 bunch fresh cilantro, chopped