Scalloped sweet potatoes - Trois fois par jour

Ingredients

• 3 sweet potatoes, thinly sliced with a mandolin (6 cups)
• 2 garlic cloves, chopped
• 3 cups of leeks (the white part), sliced
• 2 teaspoons of salt
• Pepper, as preferred
• 1 1/4 cup of cooking cream, 15%
• 1 triple cream Brie cheese (300g), remove the crust and cut in pieces
• 1 tablespoon of corn starch, diluted in 2 tbsps of water
• 1/4 teaspoon of ground nutmeg
• 8 slices (200g) of raclette cheese