Cook the tortellini in boiling salted water for about 12 minutes. In the meantime grate parmesan finely. Whisk egg with cream, salt and pepper. Stir in parmesan. Drain the tortellini and let them drip off a little. Pour the tortellini into an ovenproof dish.
Divide the cold cuts between the tortellini. Pour egg-cream mixture over it. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 15 minutes. In the meantime clean, wash and finely chop the spring onion. Take the casserole out of the oven