Wash and clean the Brussels sprouts and cut them crosswise at the stalk. Cook in boiling salted water for about 10 minutes. Remove and rinse with cold water. Peel and wash the potatoes, cut into thin slices (approx. 4 mm) and cook in boiling salted water for approx. 6 minutes.
Wash, clean and slice the tomatoes. Grate cheese roughly. Season crème fraîche with paprika, nutmeg, salt and pepper. Halve the garlic clove. Spread oil on a baking dish and rub with garlic.
Layer the vegetables alternately in the form, pour crème fraîche over them, sprinkle with cheese and bake in the preheated oven (electric cooker: 225 ° C / gas: level 4) for about 20 minutes.