Chestnut, Roasted Red Pepper and Red Leicester Strudel

Ingredients

• 1 tbsp olive oil
• 1 onion, peeled and chopped
• 1 clove of garlic, peeled and crushed
• 200g / 7oz chestnut mushrooms, wiped and roughly chopped
• 100g / 4oz canned peeled chestnuts
• salt and freshly ground black pepper
• 4 sheets filo pastry
• 15g / 1/2oz butter, melted
• 150g / 5oz Red Leicester cheese, grated
• 300g jar red pimentos, drained and trimmed
• 1 tsp sesame seeds