Cut the feta into cubes. Heat olive oil in a pan, add sliced and halved zucchini and brown. Drain the oil and place the zucchini pieces on kitchen paper. Mix flour and baking powder, add eggs. Then stir in oil, milk, salt, pepper and grated cheese, add zucchini, feta and chervil and mix.
Put the dough in an ungreased dish or 4 ungreased glasses of 440 ml each.
Bake at 180 ° for about 30 minutes.
As a glass cake, close immediately with screw lids after baking, it can then be kept for about 3 months.