Zucchini skinned, cut in small cubes 1-2cm mix it with salt and leave for 15min. Dry zucchini with cloth.
2
In separate bowl mix eggs, all cheese and yogurt and zucchini. In other bowl mix sparkling water with oil.
3
Take filo out from the fridge and unpack. You have to make 4rolls (every roll with 5sheets). Put baking sheet onto the oven tray.
4
Put one filo sheet on working surface, spread the mixture of oil and sparkling water with basting brush, repeat the process with remaining 4 sheets and on the last 5th sheet spread mixture with zucchini mixture evenly (use around 1/4th of the zucchini sauce so you can have it enough for all 4rolls).
5
Roll it from the wider side and place in the baking tray. Repeat the process with remaining sheets so you can get 4 rolls.
6
Make holes with fork on top of every roll and spread some oil / sparkling water mixture on the top.
7
Bake for 40min in prepared oven on 220C. Cut when cooled down.
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Take frozen filo out of freezer night before and put it in the fridge.