¼ cup butter ½ onion, chopped ½ cup celery, chopped ¼ cup flour 4 cups chicken broth, warmed 2 (14-ounce) cans artichoke hearts, drained and chopped 1 teaspoon lemon juice ¼ teaspoon thyme 1/8 teaspoon cayenne pepper (if you double this recipe, don’t double the spice...