Ground Beef and Pistachio Kebobs-Kofte

This recipe is from Ana Sortun, chef and author of Spice Flavors of the Eastern Mediterranean. 
I highly recommend each of Ana's Cambridge, MA based restaurants.
Sofra Bakery & Cafe
Oleana
Sarma

Serves 4

​1 pound ground beef or ground lamb (85% lean)
2 teaspoons Kebob Spice Mix - recipe below
1 teaspoon Aleppo chilies
1 roasted red bell pepper, finely chopped or 2 teaspoons Turkish red pepper paste
1 egg white
1 cup toasted and coarsely ground pistachios
2 teaspoons salt
8 skewers
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For Serving
Four 10-inch pitas, cut in half
1 cup red onions thinly sliced and sprinkled with 1-2 teaspoons Sumac
1 cup Greek-style yogurt or whole-milk plain yogurt
1 cup roughly chopped tomato
1 cup roughly chopped romaine leaves
1 cup slightly sweet pickles
8 roughly chopped mint leaves

1. Prepare a charcoal or gas grill or use a stovetop grill pan.
2. Knead the ground meat with the kebob spice, chilies, and red pepper in a standing mixer with a paddle attachment on medium speed for 5 minutes, until the meat becomes creamy and a little sticky. If you don't have a standing mixer, use a food processor fitted with a metal blade, and carefully push the pulse button on and off until the meat becomes smooth. You can also do this by hand but it will take much longer.
3. Add the egg white and pistachios and continue to knead the meat with the mixer until the mixture comes together again and reassembles a wet dough. Pinch a bit of the meat off and cook it to taste for seasoning.
4. Shape the meat into eight 2-ounce patties or short sausage shapes and press each patty into a skewer. Squeeze and shape the kofte into long, thin meatballs around the skewers. Set aside. 
5. Grill the kofte for 3-4 minutes on each side, until golden brown and cooked through.
6. Rest the kofte on pita halves. Pass them around the table with bowls of slice red onions sprinkled with sumac, yogurt, tomatoes, romaine, pickles, and mint leaves.

Kebob Spice Mix
Makes 1/2 cup

2 tablespoons ground cumin
2 tablespoons dried, sieved oregano
2 tablespoons dried, sieved mint
1 tablespoon Aleppo chilies
1 tablespoon black pepper

Combine all the spices and herbs and store in an airtight container.