Preheat the oven to 180 degrees C. Prepare a pan that can be placed in the oven.
In a deep plate, beat the eggs with milk and Parmesan cheese with a fork, season with salt and oregano.
In a frying pan with a diameter of approx. 20 cm, heat the butter, clarify (collect and discard the foam from the surface). Add the garlic grated on a fine grater. Fry for a dozen or so seconds, add the cooked groats. Throw in the chives.
Stir and pour in the egg mass, season with pepper. Put in the oven (uncovered) for 15 minutes. If the pan handle is not adapted to high temperatures, it can be wrapped several times with aluminum foil.