Heat the oil in a large heavy-based pan, add the leeks, and cook over a low heat, stirring frequently, for 5 minutes, or until starting to soften. Stir in the mushrooms and cook, stirring frequently, for 5 minutes, or until they release their juices. Add the chillies and garlic, and cook for 1 minute. Pour in the wine, raise the heat, and boil for 3 minutes while the alcohol evaporates.
Stir in the thyme, then add the flour and mix well. Add a little of the milk, mix well, then add the rest of the milk and cook for 5 minutes, stirring frequently. Add almost all the cheese (reserve some for the topping), remove from the heat, and combine well. Add the tomatoes and season well with salt and black pepper.
Put a 1cm ( 1 / 2 in) layer of the mixture in the bottom of a large ovenproof freezerproof dish, then cover evenly with a layer of the lasagne sheets. Pour in another layer of sauce and cover with lasagne. Repeat the process until all the sauce is used up – you need to finish with a layer of sauce. Top with the remaining cheese and the sliced tomatoes.
Leave to cool completely, then double-wrap the dish in cling film and freeze for up to 3 months. To serve, remove the cling film, top with tomato slices, and place the dish straight from the freezer in an oven preheated to 180°C (350°F/Gas 4) for 30–40 minutes, or until browning on top and piping hot.
- 6 tbsp olive oil
- 4 large large leeks, cut into 5mm ( 1 / 4 in) slices
- 800g chestnut mushrooms, 550g sliced and 250g grated
- 2 red chillies, deseeded and finely chopped
- 6 garlic cloves, chopped
- 150ml dry white wine
- 1 small handful fresh thyme leaves
- 2 tbsp plain flour
- 900ml milk
- 350g Cheddar cheese, grated
- 450g lasagne sheets
- 6 tomatoes, roughly chopped, plus 2 sliced for serving
- 1 pinch salt
- 1 pinch freshly ground black pepper
Total time required
- Preparation time:
- Cooking time:
Key to icons
- More info
- Tesco price match
- Shopping lists
- Low Price Promise
2w+* Product life guaranteed for more than 2 weeks
6d+* Product life guaranteed for 6 days including delivery day, with an average of 10 days.
Price per litre: 78.3p
4d+* Product life guaranteed for 4 days including delivery day, with an average of 6 days.
Price per 100g: £1.38
3d+* Product life guaranteed for 3 days including delivery day, with an average of 6 days.
Price each: 16.7p
4d+* Product life guaranteed for 4 days including delivery day, with an average of 5 days.
Price per kg: £4.15
4d* Product life guaranteed for 4 days including delivery day, with an average of 4 days.
Price per 10g: 57.5p
1m+* Product life guaranteed for more than 1 month
Price per 100ml: 46p
Price per 100g: 20p
Price per 100g: 5p
Price per 10g: 49.8p
Recipe published with permission from © Dorling Kindersley Limited. Cook Express 2009.
- Life guarantee
- * Minimum life based on 'use-by' date of product. Average life based on last week's deliveries. Life guarantee shown based on delivery tomorrow and includes day of delivery. Please book a slot to view Life guarantee for your chosen delivery day. See Terms and Conditions for further details.