If preserved lemons are not available at your local grocery store, you can substitute fresh lemon zest. Preserved lemons are less acidic and saltier than fresh lemons (from the preservation process), but the fresh zest will still provide a lemony note. Aleppo pepper, also known as Halaby pepper, is ripened to a burgundy color, then semi-dried, seeded and coarsely ground. It's traditionally used in Middle Eastern and Mediterranean cuisine, and is about half as spicy as most chile flakes.