Bratwurst Sliders with Beer Cheese and Beer Braised Onions

Bahan-bahan (12 porsi)

• 12 pretzel buns (click for recipe) or other slider buns
• For the beer-braised onions:
• 1 tablespoon butter
• 1 large white onion, sliced thin
• 1 (12 ounce) bottle German beer
• 1 teaspoon sugar
• 1 teaspoon Worcestershire
• Kosher salt and black pepper, to taste
• For the bratwurst:
• 10 pre-cooked beer bratwursts, cut into fourths
• For the beer cheese:
• 10 ounces cheddar cheese, shredded
• 4 ounces Gruyere cheese, shredded
• 1 tablespoon cornstarch
• 1 cup German beer
• 2 cloves garlic, minced
• 2 teaspoons spicy brown mustard
• Hot sauce and Worcestershire, to taste