
Step 1 · Prepare Meat
Slice the lamb into thin, wide pieces for kabab barg. Cut the chicken breast into kabob-sized chunks.
Step 2 · Marinate
Marinate the lamb with grated onion, saffron, lemon juice, oil, salt, and pepper. Marinate the chicken with grated onion, saffron, lemon juice, yogurt, oil, salt, and pepper. Cover and chill for at least 4 hours, or overnight.
Step 3 · Make Mast-o Moosir
Make the mast-o moosir by stirring Persian shallots into thick yogurt with a little salt. Chill until serving.
Step 4 · Skewer Ingredients
Thread the lamb, chicken, and tomatoes onto separate skewers.
Step 5 · Grill
Grill over medium-high heat, turning as needed, until the lamb is browned and just cooked through, the chicken is cooked through, and the tomatoes are blistered.
Step 6 · Serve
Serve with sumac, raw white onion, grilled tomatoes, mast-o moosir, and warm pita bread.