Using a box grater grate the onion, and then squeeze it to remove excess liquid. In a medium bowl mix together the onion, spice blend, garlic, lamb, beef, parsley and salt.
Divide the mixture into 4 balls and form in a sausage shape around each skewer; the meat should cover all but about 1/2 inch on either end of the skewer. Place in the refrigerator to chill for 1 hour.
Heat a 12-inch cast-iron skillet over medium-high heat and cook the meat skewers for 5 to 6 minutes per side.
Salad
In a medium bowl, add the sliced onion and drizzle with red wine vinegar.
Add tomato, cucumber and chives.
Drizzle with oil and sprinkle with salt.
Toast the pita.
Serve each kofta kabob with a pita and some of the tomato cucumber salad.