Tuna Corn Chowder

Name: Tuna Corn Chowder
Ingredients: 3 tablespoons butter or 3 tablespoons margarine; 1⁄2 cup diced celery; 1⁄2 cup diced onion; 3⁄4 cup diced carrot; 3 tablespoons flour; 1 teaspoon dried thyme; 1 (17 ounce) can cream-style corn; 2 cups milk; 1 (7 ounce) canlight tuna, drained; 1 cup bottled clam juice or 1 cup chicken broth; salt and pepper