Lunch this week at the Moroccan restaurant Cafe Mogador reminded me of just how much I love this lively North African cuisine. Heady spices merge with fluffy grains, piquant fruits, and tender pulses, poultry and fish to create some of the most distinctive, delectable foods that I’ve ever eaten. Of the wonderful Moroccan offerings, the most unique has to be bisteeya. Considered by many to be Morocco’s most complex and elegant dish, this flaky, poultry-filled pastry remains beyond compare. Bisteeya has its roots in the Middle East. As early as the 7th century, Arab invaders introduced the concept of encasing spiced meats and nuts in dough. They also encouraged the use of paper-thin leaves of pastry, which Moroccans perfected and now refer to as warka. Warka is one of several ingredients that make bisteeya so memorable. To make warka, you press a ball of well-kneaded dough onto a hot, flat pan. As soon as the edges begin to dry, peel off the leaf and place it on a clean, flat surface. Cover it with a …