In a large pot add the vegetable broth bring to a boil and add the cabbage, cook until tender, approximately 10 minutes. Taste the broth for salt and pepper.
In a medium pan add the oil, butter and garlic clove, heat until hot, then fry the bread cubes until lightly golden on both sides, drain on a paper towel lined plate.
In a medium / large high sided baking dish make 2 layers of the cabbage, bread cubes, cheese, broth and top with parmigiano, pour the remaining stock over and bake 25-30 minutes. Serve immediately. Enjoy!
If all the broth does not fit in the dish just add it to the soup bowls when serving.
Notes
How to store the Aosta Valley Cabbage Soup
Leftovers can be refrigerated in an airtight container for up to 3 days. Reheat in a 350°F/180C oven until warmed through and the bread on top is lightly toasty.