The recipe is off in terms of quantity and cooking method, the mix of veggies is fine i guess.
You get a huge amount of veggies which can only fit in very large trays, not to mention the meat. The potatoes remained mostly undercooked, even some of the zuchinni.
It would need a lot more oil,probably some added water and precooking the potatoes at least.
There are other, better recipes of this kind our there.