Halve the zucchini lengthways and remove the pulp and seeds with a spoon and cut the pulp into small pieces. Place the zucchini in a baking dish, season with salt and pepper.
Peel the onions, carrots and garlic and cut into small cubes. Fry together with the minced meat in a pan. Add the zucchini pieces and the diced tomato and cook for another 4 minutes. Season with cinnamon, lemon zest, salt and pepper.
Fill the zucchini halves with the mixture. Chop the mint and sprinkle with the cheese over the zucchini. Cook at 200 ° C top / bottom heat for about 20 minutes, until the cheese is nicely baked.
Season the natural yogurt with salt, pepper and lemon juice and serve with it.