Start by frying the turkey mince in large frying pan with a tbsp of olive oil on a medium heat for around 8 minutes. Season with 1 tbsp oregano and a pinch of salt.
Meanwhile, slice the courgettes and aubergine into thin rounds.
Once the mince has browned, throw in the passata and reduce to a simmer for 10 minutes.
In a separate pan on a low heat, add 2 tbsp of olive oil and combine with 2 tbsp of flour to form a paste. Slowly pour the pint of milk into the pan while whisking. As soon as the white sauce thickens, remove from the heat and add a sprinkle of cheese.
Add the layers of mince, tomato sauce, courgettes and aubergines and a layer of lasagna sheets into the baking dish, finishing with a thick layer of the white sauce and grated cheese on top. Repeat this to add the next layer and again finish off with a thick layer of the white sauce and grated cheese on top. Pop in the oven for 40 minutes, cover with foil until half way through.
Leave to rest for 10 mins before serving!