In a frying pan sprayed with frylight cook the sausages. When cooked leave aside to cool.
Frylight another pan and cook the onions, mushrooms and bacon.
When cooked add the beans, passata, salt and pepper.
Cook for about 10 minutes.
In an ovenproof dish spoon some of the beans mixture into the dish.
Add a layer of lasagne sheets and repeat 2-3 times.