Classic Chicken Pot Pie Recipe

Ingredients

• 2 tablespoons olive oil
• 1 1/2 pounds boneless chicken thighs
• 1 large yellow onion
• 2 large carrots
• 2 stalks celery
• 1/4 cup unsalted butter
• 1/4 cup all-purpose flour
• 3 cups chicken stock
• 1 tablespoon fresh thyme leaves
• 1/2 cup heavy cream
• 1 cup peas
• 1 cup pearl onions
• 1 large sheet frozen puff pastry
• 1 large egg