Peel the zucchini, dice them and divide them into 2 equal-sized piles.
For the filling, beat the eggs, add the crumbled feta cheese, yoghurt and finely chopped garlic and dill to them.
Arrange a layer of zucchini at the bottom of an oiled oven dish. Distribute the filling on top.
Sprinkle with ground walnuts. Arrange the 2nd half of the zucchini. Finish off with grated cheese. Bake in a moderate oven.