Cook the Spätzle in plenty of boiling salted water for about 10 minutes until al dente. Meanwhile grate cheese. Wash the marjoram, dab dry, pluck and chop half of it finely. Put the rest of the marjoram aside. Mix milk, cream, eggs and 100 g grated cheese with a whisk. Season with salt, pepper and a little nutmeg. Drain the spaetzle and rinse with cold water. Drain well
Grease the pizza baking tin (28 cm Ø). Add the spaetzle and pour the cheese-cream mixture over it. Press on lightly. Bake in the preheated oven (electric cooker: 200 °C/ convection oven 175 °C/ gas: level 3) for approx. 10 minutes. Wash the tomatoes, dab dry and cut in half. Cut out the stalk. Wash marjoram, dab dry and pluck coarsely
Take out the pizza. Cover with the tomato halves, remaining marjoram and cheese and bake in the oven at the same temperature for another 10-15 minutes