Clean, wash and cut the spring onions into rings. Wash and chop the tomatoes. Whisk eggs, cream, salt, pepper and nutmeg. Heat oil in a large pan. Brown the spring onions in it, steam the tomatoes briefly.
Season with salt and pepper. Add the egg cream. Leave to set at medium heat for about 10 minutes. Turn and allow to set for another 10 minutes.
Wash the herbs, shake dry and chop or cut into small rolls. Mix with crumbled cheese. Serve with the frittata.