How to cook
Cut the zucchini in half down the middle. If the zucchini are small, prepare more of them and cut off the narrower end (in order to fill the thicker end with more stuffing).
Fill the carved out zucchini with this mixture and arrange them in an oven dish. Close the opening with a round slice of raw potato. Make the tomato sauce: grate the tomatoes and mix them with the water and spices.
You have to have enough liquid in order for the raw rice to cook. Pour the sauce in the oven dish around the zucchini. Bake in a preheated 392°F (200 °C) oven for about an hour. If necessary, you can add water during baking if it boils off and there's not enough of it.