Open-Face Beef & Blue Cheese Sandwich | culture: the word on cheese

Ingredients

• 2 tablespoons mayonnaise
• 1 teaspoon prepared horseradish
• 1/8 teaspoon salt
• 1 kaiser roll
• ½ pound thin-sliced roast beef
• 4 slices each ¼-inch thick blue cheese (such as Firefly Farms Black and Blue)
• 7/8 cup half a 14-ounce jar roasted red peppers
• 2 tablespoons finely chopped fresh parsley
• Vegetable oil for frying
• 1 large egg
• 1 tablespoon milk
• 6 tablespoons all-purpose flour
• ¼ teaspoon salt
• ¼ teaspoon freshly ground black pepper
• ½ medium yellow onion (thinly sliced)