Andrew Zimmern highlights lean elk, first crafting classic Mexican tostadas with grilled tenderloin, avocado, and homemade salsa macha. Then, he grills a whole rack of elk, serving it with creamy colcannon, tarragon emulsion, and rosemary charcoal.Andrew Zimmern highlights lean elk, first crafting classic Mexican tostadas with grilled tenderloin, avocado, and homemade salsa macha. Then, he grills a whole rack of elk, serving it with creamy colcannon, tarragon emulsion, and rosemary charcoal.