-
1
Thoroughly toss together the cabbage, salt, vinegar, preserved lemon, and harissa. Cover and refrigerate for at least 2 hours, or up to 24 hours. Allow to return to room temperature before serving.
-
2
For the leek patties: Cut the leeks in half lengthwise and then into 1/4-inch-wide half-moons. Wash in 3 changes of water and dry thoroughly (a salad spinner works well for this).
-
3
Heat the olive oil in a large skillet over medium-high heat. Add the leeks and saute until tender and starting to shrivel, about 5 minutes. Transfer to a mixing bowl. (You can use the same skillet to fry the leek patties in a moment.)
-
4
Thoroughly mix the leeks, salt, eggs, bread crumbs, cumin, Aleppo pepper, and cinnamon.
-
5
Heat about 1/8 inch vegetable oil in the skillet over medium-high heat. When the oil is shimmering, drop in 1/4 cup leek batter with a measuring cup and use the back of the cup to smooth the patty into a circle about 4 inches in diameter. Repeat with remaining batter, making 8 patties total (fry them in two batches if necessary, adding a bit more oil as needed). Fry each patty until golden brown, about 3 minutes per side. Transfer to paper towels and season with flaky sea salt.
-
6
To finish the sandwiches: Place 2 leek patties on a pita. Top with a handful of the spicy cabbage, 5 cucumber slices, and 2 tablespoons Greek yogurt. Sprinkle a little sumac on the yogurt and scatter a few mint leaves over the whole sandwich. Repeat with remaining ingredients. Fold the pita over to eat as a sandwich. Serve immediately.