4 crimini or button mushrooms, cleaned, finely chopped
1/4 teaspoon cayenne pepper
1 tablespoon chopped fresh parsley
1 tablespoon chopped fresh chives
1 teaspoon salt
1/2 teaspoon freshly ground black pepper
6 cups cubed (1-inch cubes) French or Italian bread (6 ounces)
1 cup (4 ounces) shredded sharp cheddar cheese
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Let's Make It
Heat the butter in a large skillet over medium heat. Add the onion and celery and cook, uncovered, stirring occasionally, until softened, about 5 minutes.
Add the asparagus and water and cover. Cook until the asparagus is crisp-tender, about 3 minutes. Uncover and cook until all liquid is evaporated, about 2 minutes.
Transfer the vegetables to a large bowl. Add the chicken and mayonnaise and mix well. Whisk the milk, broth, eggs, mushrooms, cayenne pepper, parsley, chives, salt and pepper in another bowl.
Lightly butter a 13x9-inch glass baking dish. Spread half of the bread cubes in the dish, and then top with the chicken mixture. Spread the remaining cubes over the chicken. Slowly pour the egg mixture over the ingredients in the dish. Cover and refrigerate for at least 4 hours and up to 10 hours.
Position a rack in the center of the oven and preheat to 350°F. Bake the strata for 45 minutes. Sprinkle the top with the cheese, and bake until the cheese is melted and a knife inserted in the center comes out clean, about 15 minutes more. Let stand for 5 minutes, then serve hot.