4: Place a large saucepan over medium heat and pour in 1 litre whole milk, 2 bayleaves, 1 garlic clove and 1 sprig thyme, then season with salt and pepper.
5: Pour in the cauliflower and cook until tender. Drain and set aside.
6: Do the same with the potato slices.
7: Then add the cabbage strips. You're done with the milk, so I suggest you remove and discard the garlic, bay leaf and thyme, then set it aside, or freeze it, for another savoury recipe (béchamel sauce in particular).
8:
Assembling the gratin
Preheat your oven to 200°C (390°F). Butter a gratin dish.
9: Pour in the cauliflower.
10: Then the cabbage and half the Saint-Nectaire cheese, cut into strips.
11: Add the potatoes, pour over 250 ml liquid cream, then the other half of the Saint-Nectaire cheese, also in strips.
12: Bake at 200°C (390°F) for around 30 minutes. Your gratin auvergnat is ready.
Remarks
To cook vegetables in milk, each time you finish cooking a vegetable, pour the contents of the saucepan (milk + vegetables) into a colander placed on a salad bowl, then pour the milk back into the saucepan for the next vegetable. It's quicker and easier than removing the vegetables with a skimmer. As with all gratins, the quantities given are a guide only, so don't hesitate to adapt them to your own taste, or to what you have on hand. For a more golden gratin top, sprinkle with an additional 80g of grated cheese, ideally Cantal, before putting in the oven.