Tuna empanada pie - Good Food Middle East

Ingredients

• 1 tbsp olive oil
• 1 onion, finely chopped
• 1 garlic clove, crushed
• 3-4 medium potatoes, cubed
• 2 carrots, diced
• 2 red peppers, diced
• 1 tbsp smoked paprika
• 1 tsp each dried oregano and thyme
• 2 tbsp tomato purée
• 300ml vegetable stock
• 185g can sustainable tuna in spring water, flaked
• 500g pack shortcrust pastry
• 1 egg, beaten