1) Coat leg roast with olive oil, then a generous rub with cinnamon/cumin/coriander powder plus salt and pepper.
2) Throw in to oven bag with some chopped garlic and a few more splashes of olive oil, tie a knot in bag and leave overnight in fridge.
3) Place bag in crock pot and add enough water to cover most of bag; set to low for 5 hours and leave to cook (poor man's sous vide).
4) Remove roast and reverse sear in hot pan or on BBQ grill (not necessary, but adds to flavour).
Bookmarks