For the cauliflower-broccoli casserole, cut the cauliflower and broccoli and cook in salted water. Mix the skim milk, egg white and the canola oil.
In a bowl, add the cauliflower, broccoli, the skim cheese, the breadcrumbs, salt, pepper, the milk mixture and parsley and mix well.
Line a baking dish with baking paper. Spread the mixture on it and bake at 180 degrees in the oven until the cauliflower-broccoli casserole has a nice color.