Takes about : 30 min.
Clean and rinse the zucchini and tomatoes. Coarsely grate zucchini on a grater. Cut tomatoes and mozzarella into 4 slices each. Chop olives.
2. pack contents in a wide-mouth mold. Add about an eighth of a quart of cold water and stir everything together with a whisk. Fold in zucchini grated and oregano.
Heat oil in a large, non-stick frying pan. Pour in batter in 4 portions, smoothing out. Toast, turning, about 8 minutes over medium heat until golden brown.
Top each pancake with tomato slice and mozzarella. Sprinkle with olives and coarse pepper. Bake with lid on for about 5 minutes until cheese is melted.
Tip: The flesh of young, small zucchini is much more tender than that of larger ones.