In a heat proof bowl, place sliced zucchini. Pour boiling water over zucchini and let sit for 3 minutes. Drain and set aside.
In a separate bowl, whisk together eggs, cottage cheese, rice, salt, onion, marjoram and chives.
Layer the bottom of prepared casserole dish with zucchini, then pour half egg mixture on top. Do another layer of zucchini and pour the rest of egg mixture on top. Spread parmesan and mozzarella on top.
Bake for 45 minutes, or until casserole seems set.