1. Trim any excess fat from lamb racks.
2. Combine all the other ingredients in a bowl, spread mixture evenly over lamb racks.
3. Place lamb racks on wire rack in baking dish. Bake in pre-heated oven 190c for 20 Min's, cover racks with greased foil and bake for a further 10 Min's or until tender.
4. Note: I only cover to prevent the sesame crust from burning, so if it looks fine you do not need to cover.