Lamb and Eggplant Shepherd's Pie

This Greek-inspired shepherd's pie is made with lamb, eggplant, and oregano. The mashed potato topping gets its Greek flavor from kasseri cheese, a hard, salty cheese. If you can't find kasseri cheese, use Pecorino Romano instead. Finish the dish with a sprinkling of chopped fresh oregano, if desired.
Bon Appetit March 2009