CHICKEN POT PIE

Steps:

• Preheat oven to 425 degrees.
• Place chicken, chopped onion, celery, and chopped carrots in a large stockpot; season with salt and pepper and enough water to cover. Wrap thyme and garlic in a piece of cheesecloth and tie with kitchen twine to enclose; add to pot. Cover pot and place over medium heat; bring to a boil. Reduce heat to a simmer and cook until chicken is no longer pink, about 25 minutes. Strain, discarding vegetables, and reserve chicken and liquids separately; let cool and set aside.
• Meanwhile, bring a medium pot of salted water to a boil and prepare an ice-water bath. Add baby carrots to boiling water and cook until tender, about 5 minutes. Drain and immediately transfer to ice-water bath until cool. Drain; set aside. Place peas in boiling water and cook about 30 seconds; drain and set aside. Add pearl onions to boiling water and cook about 1 minute, transfer to ice-water bath until cool. Drain; set aside.
• Heat 1 teaspoon butter in a medium skillet over medium heat. Add mushrooms and cook until browned, 3 to 4 minutes; let cool.
• Cut chicken into bite-size pieces and place in a large nonreactive bowl along with baby carrots, peas, pearl onions, and mushrooms; set aside.
• In a medium skillet, heat remaining 4 tablespoons butter. Add flour and cook, stirring, for 1 minute. Add 1/2 cup of the reserved cooking liquid and heavy cream. Cook, stirring constantly, until liquid comes to a boil. Reduce heat to a simmer and cook for 2 minutes. Remove from heat and add hot sauce and Worcestershire sauce; season with salt and pepper. Add to bowl with chicken and vegetables; toss to combine.
• Divide mixture evenly between four 13-ounce shallow baking dishes. Cut puff pastry into four 8-inch circles and place on top of each of the bowls, crimping edges as desired. Cut a slit in the center of each piece of puff pastry to allow steam to escape; brush beaten egg over puff pastry.
• Transfer bowls to a baking sheet. Bake until puff pastry is golden brown and filling is bubbling, about 25 minutes. Let stand 5 minutes before serving.