Totché

Instructions

1. Preheat the oven to 180 °C and butter a gratin dish.
2. Cook the sliced onions in the butter for 8 minutes over medium heat, until tender.
3. In a bowl, beat the eggs with the sour cream, milk, salt, pepper and nutmeg.
4. Add the bread cubes and let them soak for 10 minutes, stirring from time to time.
5. Mix in the onions and half the Gruyère, then pour everything into the buttered dish.
6. Sprinkle over the rest of the cheese and bake for 35 minutes, until the top is golden and the centre is still tender.
7. Let it rest for 5 minutes before cutting and serving.