Prepare your oven bag with flour. Put the leg of lamb in the bag.
In a saucepan heat the garlic, honey & lemon juice, pour onto the lamb, seal and rub the marinade over the lamb.
You can let the lamb marinade for a few hours if you have time.
Preheat oven to 350f/180c , put bag in a baking tray and remember to make steam holes as per bag instructions.
Bake for 1 ½ to 2 hours. If you want you can make a sauce out of the bag juices.