Courgettes cleaned and cooked purposes briefly in salted water. Once cool split in half lengthwise and scoop carving inside them - to become like boats. Minced meat fry gently in a little oil and water, add the minced meat garlic inside the courgettes, part of the grated cheese, chopped mushrooms, black pepper, salt to taste. All stir and stew for another few minutes. Arrange squash in a baking dish and each put a piece of butter, a pinch of salt and mix. Sprinkle top with cheese and bake in a moderate oven for about 25 minutes.