Preparation

• 将架子放置在距肉鸡5到6英寸的架子上，然后将肉鸡加热。
• Butter both sides of each piece of bread and place on a large rimmed baking sheet. Lay 2 slices of prosciutto over each piece of bread and then shingle half a pear over each.
• Melt the 1 Tbs. butter in a 2-quart saucepan over medium heat. Whisking constantly, add the flour and cook until golden, about 1 minute. Add the milk and beer; whisk until thick and bubbling, about 2 minutes. Add all but 1/4 cup of the cheese, the mustard, and 1/4 tsp. pepper and whisk until bubbling, just a few seconds. Season to taste with salt and pepper.
• Spoon about 2 Tbs. of the cheese sauce over each sandwich. Sprinkle with the remaining cheese. Broil until bubbling and browned, 4 to 5 minutes. Cool briefly before serving.