Asian styled lamb racks

Ingredients

• Sauce
• 1/2 cup beef stock
• 2 teaspoon sesame oil
• 2 teaspoon tahini (sesame paste)
• 15 gram butter
• 4 racks of lamb (200g each), trimmed
• 2 clove garlic, finely chopped
• 2 1/2 medium_piece ginger, grated
• 2 tablespoon sesame seeds, toasted
• 1 tablespoon sugar
• 3 tablespoon light soy sauce
• 1 teaspoon sesame oil
• 1 tablespoon light olive oil
• salad, to serve