Preheat oven to 400°F degrees.
Season chicken breasts with salt and pepper.
Crush pretzels in food processor until fine.
Set up three bowls for breading station.
Dredge chicken in flour first.
Dip in beaten eggs next.
Coat completely with crushed pretzels.
Place on greased baking sheet.
Bake for 20-25 minutes until golden.
Check internal temperature reaches 165°F.
Meanwhile, melt butter in small saucepan.
Add cream and mustard, whisk together.
Gradually add cheese, stirring constantly.
Cook until smooth and creamy.
Serve chicken hot with warm sauce.