Persian Koobideh Kebab — Melograno

Ingredients

• 2 lbs ground beef (80/20), or 1 lb beef + 1 lb ground lamb
• 1 large yellow onion, finely grated and squeezed dry
• 2 garlic cloves, grated
• 1 tsp ground turmeric
• 1 tsp black pepper
• 2 tsp kosher salt
• ½ tsp ground sumac (plus more for serving)
• ¼ tsp saffron threads, bloomed in 2 tbsp hot water
• 1 tbsp olive oil