- 1 (17.5 ounce) package frozen puff pastry, thawed
- 2 links chicken sausage, halved lengthwise and cut into bite-sized pieces
- 3 tablespoons butter
- 4 carrots, cut into bite-sized pieces
- 1 leek, halved lengthwise and cut into bite-sized pieces
- 2 garlic cloves
- 1 (4 ounce) package mushrooms, quartered
- 3 tablespoons all-purpose flour
- 1 1/4 cups vegetable broth
- 1 tablespoon Dijon mustard
- 1 teaspoon ground cayenne pepper
- 1/2 teaspoon ground nutmeg
- salt and ground black pepper to taste
- 1 egg
- 1 tablespoon water
- Roll out each puff pastry sheet to an even thickness. Cut two 8-inch rounds from each sheet using a sharp knife.
- Line bottom and sides of two 8-inch pie tins with pastry rounds. Reserve 2 pastry rounds for tops of pies. Place pie tins and tops on a baking sheet; transfer to the refrigerator.
- Cook and stir sausage in a skillet over medium heat until browned, about 5 minutes. Drain excess grease. Add butter, carrots, leek, and garlic; cook and stir until leek softens, about 5 minutes.
- Stir mushrooms into the skillet; cook until tender, about 8 minutes. Stir in flour for 1 minute. Pour in vegetable broth slowly; add Dijon mustard, cayenne pepper, nutmeg, salt, and pepper. Cook and stir until sauce thickens, about 5 minutes.
- Preheat oven to 400 degrees F (200 degrees C).
- Divide sausage mixture evenly between the pie tins. Cover with pastry tops.
- Whisk egg and water together in a small bowl to make egg wash. Brush egg wash over pastry tops.
- Bake in the preheated oven until golden brown, about 35 minutes. Cool briefly before slicing, about 10 minutes.