Chicken Pot Pie

• 6 tablespoons butter, salted or unsalted
• 1 large onion, chopped
• 1 1/2 pounds potatoes, peeled and cut into approx. 1″ cubes
• 1 pound (about 6 medium) carrots, cut into approx. 1″ pieces
• 10-12 ounces mushrooms, sliced
• 1/2 cup cognac
• 6 tablespoons all-purpose flour
• 2 cups chicken stock
• 1 cup milk
• 5 cups chicken, cooked (roasted or poached)
• 1 cup fresh or frozen green peas
• 5 teaspoons dried parsley
• 2 1/2 teaspoons dried thyme
• 1/2 teaspoon dried sage
• 3 teaspoons salt
• 1 teaspoon black pepper
• 1 sheet frozen puff pasty, thawed
• 1 egg yolk and 1 teaspoon water for egg wash
• Extra salt and pepper to taste

Preparation Click here for preparation method.