01 - In a large bowl, combine ground beef, minced garlic, grated onion, parsley, cumin, coriander, smoked paprika, chili flakes, salt, and pepper. Mix until just combined, being careful not to overwork the meat.
02 - Divide the mixture into 8 equal portions. Shape each portion into a thick oval patty, then gently flatten with your palm to approximately ¾ inch thickness for the classic smashed kebab form.
03 - Squeeze excess moisture from the grated cucumber using your hands or a clean towel. Combine with Greek yogurt, dill, lemon juice, minced garlic, salt, and pepper. Stir well and refrigerate until ready to serve.
04 - Heat olive oil in a large skillet or grill pan over medium-high heat. Add kebabs and cook for 4 to 5 minutes per side until deeply browned and cooked through to an internal temperature of 160°F.
05 - Arrange the hot kebabs on a platter with generous dollops of cucumber yogurt sauce. Garnish with sliced red onion, fresh herbs, and serve alongside warm flatbreads or rice if desired.