An Unusual Pizza

It is necessary:

1 kg boiled potatoes
onion,
250 ml milk
3 gherkins,
2 tablespoons flour
5 eggs
100 g ham,
3 tablespoons Parmesan cheese,
salt,
pepper,
ketchup,
300 g feta cheese.

Preparation:

Peel and grate the boiled potatoes.
Add 100 ml of milk, flour, 3 eggs, Parmesan cheese, salt and pepper.
Put the prepared mixture into a pan and bake at 200 ⁰ C in preheated oven for 20 minutes.
Mix feta cheese, 150 ml milk, 2 eggs, finely chopped onion and sliced gherkins.
Prepared mixture spread over crust of potatoes.
Over mixture spread thinly sliced ​​ham and pour ketchup.
Bake in preheated oven for 20 minutes at 180 ⁰ C.