As for butterflying turkey legs, its fiddly but worth it, turkey has great flavour and it carried the marinade extremely well. Releasing the bone was very simple - I ran a knife down the length of the bone, gently sliced the meat from around the bone and made a round cut at the base - about 3 minutes. The fiddly part is removing the tendons from the meat - they are slippery and strong. Do what this guy does between minute 2 and 3, I used a knife and it sucked.
2 turkey legs butterflied
5 heaped tbs yoghurt
2 cloves garlic
3 handfuls dried cranberries
1/2 bunch basil
A good handful of thyme
1 heaped tbs seeded mustard
2 tbs olive oil
2 tsp sesame oil
Salt and cracked pepper
Combine all of the ingredients except the turkey in a blender and blitz until smooth. Cover the butterflied turkey with half of the marinade and refrigerate for a couple of hours. Cook on a preheated medium low barbecue, turning occasionally. If possible use a lid or cover with a baking dish/foil. Should take between 20 and 30 mins but just keep checking. Serve with some of the unused marinade and possibly a squeeze of lemon.