Cooking with Steve: Beer Cheese Brat on a Pretzel Bun - Polidori Sausage

Ingredients

• 1 lb Polidori Bratwurst
• 1 medium onion
• 2/3 cup beer
• 6 tbs unsalted butter
• 1/4 cup all-purpose flour
• 1 tsp onion powder
• 1 tsp garlic powder
• 1/8 tsp cayenne powder
• 1/2 tsp salt
• 1 cup milk
• 1 tsp Dijon mustard
• 1 tsp Worcestershire sauce
• 2 cups shredded sharp cheddar cheese (8 oz.)
• 1 cup shredded Gruyere cheese (4 oz.)
• 1 package soft pretzel sausage buns