Prep. time: 15 minutes
Cooking time: About 1 hour
Oven temperature: 180° C / 350° F

1. Peel the onions and slice them thinly.
2. Sweat them over low heat in melted butter until translucent but not browned.
3. Line a tart or pie plate with the pâte brisée (pie pastry).
4. Cover with the onions.
5. Beat the eggs with the cream; season with salt, pepper and nutmeg; pour over the onions.
6. Bake in a preheated 180° C (350° F) oven for 30-40 minutes. Serve hot.