In the meantime, peel the potatoes and cut into strips with a paring knife. Season the strips with salt, pepper and paprika powder, then spread them on an oil-coated tray and bake for about 10 minutes.
Clean the beans and cut the cauliflower into florets. Wash the vegetables and cook in salted water until they are firm to the bite.
Peel and dice the onions. Heat the butter in the pan and sweat the onions until translucent. Dice the tomatoes, add to the onions and let them sweat briefly. Put everything on the side.
The beans and cauliflower should be done by now, then strain them off. Fry the beans in the pan with butter for about 5 minutes.
Take the potatoes out of the stove. Mix the potatoes and add the tomato and onion mixture. Add the beans and cauliflower.
Cut the cheese wedges in half and divide over the vegetables. Finally, mix the tomato paste and the broth with warm water and pour on the vegetables.
Bake the casserole at 200 ° C for about 15 minutes.