Peel the raw potatoes and cut into thin slices. Also cut the beetroot into slices. Layer the two alternately in a baking dish. Then cut the celery slices into larger pieces and place them on the vegetables.
Mix the cream with the cheese, season well with nutmeg, oregano, salt and pepper. Spread the mixture on the vegetables.
Place the mold in the preheated oven at 175 ° C for one hour, until the cheese is golden brown.
Tip: The cream can also be replaced with milk to save a few calories.