Easy beef wellington

Ingredients

• Duxelles
• 30 gram butter
• 1/2 onion, chopped
• 2 clove garlic, crushed
• 125 gram button mushrooms, finely chopped
• 2 teaspoon worcestershire sauce
• 300 gram lean beef mince
• 1/2 onion, finely chopped
• 1 egg, lightly beaten
• 2 tablespoon tomato sauce
• 1 tablespoon vegetable oil
• 2 sheets frozen puff pastry
• 1 tablespoon milk, for brushing
• salad, to serve