Beat the eggs with the milk, flour and baking powder.
To them, add the grated feta cheese and 2/3 of the cheese. Add the spices and stir well.
Smear the oven dishes (I used 1 medium-sized one and 4 smaller ones) and pour in the mixture.
Arrange the slices of tomatoes on top and sprinkle with the rest of the cheese. Bake at 392°F (200 °C) about 30-35 min.