Preheat oven to 400°F. Whisk together eggs and 1 tablespoon mustard in a shallow bowl; stir together pretzels, breadcrumbs, and oil in a separate shallow bowl.

Pound chicken to an even thickness between plastic wrap using a meat mallet. Dip chicken in beaten egg mixture, letting excess drip off; dredge in pretzel mixture, pressing to coat.

Place coated chicken on a greased wire rack on a large rimmed baking sheet. Bake 15 to 18 minutes or until chicken is done.

Meanwhile, melt the butter in a saucepan over medium heat. Whisk in flour; cook 1 minute, whisking constantly. Add milk; cook 3 to 5 minutes, whisking occasionally, or until slightly thickened.

Stir in cheese, 2 tablespoon mustard, paprika, salt, and pepper; cook until cheese melts and sauce is thickened. Serve sauce with chicken.

Cook potatoes and broccoli according to package directions.

Toss broccoli with garlic powder, salt, and pepper.