3 cups fat-free, less-sodium chicken broth
3 tablespoons cornstarch
1 tablespoon butter
1 cup finely chopped onion
1 garlic clove, minced
4 cups fresh corn kernels (about 8 ears)
3/4 teaspoon salt
1/4 teaspoon ground red pepper
1/2 cup 2% reduced-fat milk
1/2 cup half-and-half
8 ounces lump crabmeat, shell pieces removed (about 1 1/2 cups)
1/3 cup chopped peeled avocado
3 tablespoons chopped fresh basil