Peel, wash and dice the potatoes. Wash and dice the tomatoes. Clean, wash and cut broccoli into florets. Blanch briefly in boiling salted water and drain.
Grease an ovenproof dish and layer potatoes, tomatoes and broccoli. Whisk eggs and milk. Wash herbs, chop finely and add. Season with salt, pepper and nutmeg. Pour egg milk over the vegetables and bake the casserole in a preheated oven (electric range: 200 °C/ gas: level 3) for approx. 45 minutes.