Salt Cod Gratin

Name: Salt Cod Gratin
Prep time: 10 min
Cook time: 50 min
Total time: 50 min
Yield: 6 portions
Ingredients: 50 g bread, day old; 100 g bread, day old; 100 g milk; 50 g olive oil; 200 g onions; 2 garlic cloves; 300 g carrots; 400 g salt cod, presoaked, desalted and shredded; 1 pinch fine sea salt; 1 pinch ground black pepper; 300 g milk; 60 g plain flour; 30 g unsalted butter; ½ tsp fine sea salt; 1 pinch ground black pepper; 1 pinch ground nutmeg; 200 g double cream