Mushroom and Chicken Pot Pie

Ingredients

• Filling

  • 1 lb (454 g) white button mushrooms, sliced
  • 1/4 lb (115 g) oyster mushrooms, sliced
  • 1/4 lb (115 g) shiitake mushrooms, stem removed, sliced
  • 1 onion, chopped
  • 2 tbsp butter
  • 2 tbsp (30 ml) olive oil
  • 2 tbsp unbleached all-purpose flour
  • 1 cup (250 ml) chicken broth
  • 2 cups (340 g) cooked chicken or turkey meat, diced
  • 2 tomatoes, diced

• 
Crust

  • 1/2 lb (225 g) puff pastry, thawed
  • 1 egg, lightly beaten