We had a big foodie discussion about this before Christmas.

My tried & trusted recipe is...

Trim, peel & shred the sprouts. Steam for 2-3 minutes. Saute pancetta & shallots until it's starting to crisp up, add the sprouts & cook for another 2 minutes. Add the grated zest of an unwaxed lemon & a squeeze of lemon juice. Season with freshly ground black pepper & a TINY bit of salt.

Leftovers? Mix with leftover mashed potato, form into patties & fry 4-5 minutes on each side in a bit of olive/rapeseed oil until brown.