Cook the peas and drain well. Add everything else and whizz with a hand blender or similar until smooth. Leave some peas unblended if you would like that.
To Make Bechamel
For the bechamel layer, melt the butter in a saucepan, then add the flour and stir around to mix and cook a little. Now add half a cup of the milk and stir continuously until the milk is absorbed. I like to use a small whisk for this. Repeat until all the milk has been used. Infuse with a bay leaf or two if you have any
Simmer very gently for around half an hour with the lid on. This prolonged cooking time really does improve the flavour, but if you don't have the time, go straight to the next stepclick here to start a 30 minute timer
Add a little grated nutmeg right at the end if you have any. Season well with salt and pepper, taste and adjust. Use a little spoon of mustard as well if you like. All the seasonings are added at the end of the cooking time as the heat of the cooking reduces their flavour. We still have to cook it in the oven of course.
To Make Pasta
If you want to make pasta, for cheapness, or to make the dish vegan – for 2, put 50g flour in a bowl and add enough cold water to make a pastry like dough. For 4, use 100g flour. Knead a little, or just leave in the bowl for a couple of hours and the gluten will develop. Divide into 3. Roll out each third to the thickness of a credit card and approximately the shape of your dish.Or just use value pasta sheets.
Layer Up Your Lasagna
Now layer up your lasagna in an ovenproof dishDivide your pea hummus into 3 sections in the saucepan. Divide the bechamel into 4 sections in the saucepan. Divide the cheddar into 4.
Layer oneHummusBechamelsprinkle with cheddarPasta or lasagna sheets
Layer tworepeatHummusBechamelsprinkle with cheddarPasta or lasagna sheets
Layer threerepeatHummusBechamelsprinkle with cheddarPasta or lasagna sheets
Now top it all off with the last layer of bechamel. Sprinkle with the last cheddar
Bake at 180c for about half an hour until golden and bubbling.click here to start a 30 minute timer