Slow cooker vegetable lasagne for 4

Scaled to serve 1

I'm not one for vegetable lasagne but this is actually really nice. Double, quadruple or more the mozzarella for more mozzarella. Layer the components in the slow cooker from bottom to top: half aubergine disks, half of lasagne sheets, third of veg mixture, remaining aubergine, remaining pasta, remaining veg mixture.

0.5 onionsslicedfry for 5 min until softenedstir cover and cook for 5 minslayer as in descriptioncook on high for 2.5 - 3 hoursscatter on top and leave 10 minutes to melt
0.5 cloves of garlicchopped
0.2 tbsp of oil
0.5 large courgettesdiced
0.2 red pepperdeseeded and roughly sliced
0.2 yellow pepperdeseeded and roughly sliced
100.0 g of chopped tomatoes
0.5 tbsp of tomato puree
0.5 vegetable stock cubesfinely chopped
0.4 tsp of dried basil
0.2 large auberginesliced into disks
1.5 lasagne sheets
62.5 g of mozzarellachopped