Cut the ham into strips. Peel and chop onion. Grate cheese roughly. Mix spaetzle, ham, onion and peas, season with salt, pepper and nutmeg and put into greased ramekins. Sprinkle with cheese
Cook in the preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see manufacturer) for approx. 20 minutes