Put the pumpkin, potatoes and cauliflower in a large roasting pan, with some water and the garlic
Bake at 180 for 30 mins or until soft (or if you have a the chefs large roasting pan, on the stove, lid on for 15 mins)
Add the zucchini and mushrooms for another 5 minutes
When the vegies are soft, put them in a bowl and in the same dish, pour some passata in
Layer lasagne sheets then vegies and spinach with some more passata, the salt and pepper and parsley
Do this until everything is used
On the top layer, drop some more passata and a bit of water and either cook on the stovetop for 15 minutes and brown the top in the oven, or bake at 180 for about 30 mins.
Sprinkle with vegan 'parmesan'.