Wash the vegetables and cut them in small squares. Fry the chopped spring onions in a frying pan with the oil, making them brown slowly over low heat.
Add all the vegetables (except the canned peas) zucchini, broccoli, carrots, peppers and eggplant and cook by stirring occasionally, removing the vegetables from the heat when they are still a little hard. Add to it the peas, salt and pepper and keep them aside.
You can use any vegetable that you have in your kitchen too.
Take your rectangle oven dish, pour the béchamel sauce to cover the bottom, add a layer of lasagna pasta.
Place a layer of vegetable cover, put some pieces of mozzarella and grated parmesan cheese, and cover all with the béchamel sauce.
Proceed to create another layer in the same way until all the ingredients are used up.
On the last layer of pasta pour again béchamel sauce and add on tp of it plenty of grated parmesan cheese and some pieces od butter over the top.
At this stage you can freeze it, or keep it refrigerated.
Bake it at 200 C° for 30 minutes. Wait 5-10 minutes prior to serving it otherwise you won’t be able to cut it.