Brussel sprout and potato gratin

I needed to find a way to use up the bag of brussel sprouts that I got from the reduced section in sainsburys, in a way that would make them palatable to a family that, quite frankly, has no real love for brussel sprouts.  And, apart from Ben who doesn't like 'bakes' of any sort because they invariably have creamy sauces and are topped with cheese, it was a big success!

I basically just sliced the sprouts, grated about 4 medium potatoes, minced a couple of cloves of garlic, finely sliced a medium onion, then mixed it all up in a large baking dish, seasoned it with salt pepper and some rosemary from the garden poured in a small tub of cream, topped up with a little stock (made from a cube) and dotted a little butter on top.  After baking in the oven under foil for about 1 hour or so, I removed the foil, grated some cheese on top and finished cooking it until the cheese was all brown and bubbly. Yum!

what I really like is that you could use pretty much any vegetable and potato combinations for equally delicious results.  Maybe potato and courgette, or the obvious potato and leek....or add some bacon to it.....mmmm