Quick Corn and Sausage Chowder

Name: Quick Corn and Sausage Chowder
Ingredients: * 1 lb sausage, bulk or smoked, cut or crumbled, depending on type; * 2 tb butter; * 1 large onion, chopped; * 1 clove garlic, minced (about 1 tsp ); * 2-3 tb flour, depending on how thick you like it (*if you need; gluten free, see note); * 2 1/2 cup chicken broth; * 1 1/2 -to 2 lb potato (about 3 large ), peeled and diced; * 1-2 tsp salt (to taste, using unsalted broth will need more); * 1 tsp dried basil; * 1/2 tsp black pepper; * 2 1/2 cup frozen corn kernel; * 2 cup milk; * chopped fresh parsley or chive for garnish