Snap off tough ends of asparagus. Rinse asparagus with water, and leave damp. Place flour in a resealable plastic bag; add asparagus, seal and shake to coat.
In a shallow dish, whisk together buttermilk, egg and hot sauce. In another shallow dish, combine cornmeal mix and Cajun seasoning. Dip asparagus in buttermilk mixture; dredge in cornmeal mixture.
In a large Dutch oven, pour oil to a depth of 2-inches. Heat oil over medium heat; about 360 degrees F.
Fry asparagus in batches for 4 to 5 minutes or until golden brown. Drain on paper towels. Serve with Creole Mustard Sauce.
In a small bowl, combine all ingredients. Cover and chill.
Yield: 1 cup