persian style beef kofta recipe

1 ½ pound ground beef, 85% lean 6 Green onions, white and light green parts finely chopped (reserve the dark green portions for garnish) ½ cup fresh flat leaf (Italian) parsley, finely chopped (plus extra for garnish) 3 cloves garlic (if your garlic cloves are very small, use 5) ¼ cup finely chopped walnuts 1 teaspoon ground Turmeric 1 ¼ teaspoon kosher salt ½ teaspoon Black pepper ¼ cup bread crumbs (replace with almond meal to make it gluten free) Avocado oil spray Optional: ¼ teaspoon ground saffron threads 2 cups cooked brown basmati rice (for serving) Plain greek yogurt (for serving) Shirazi salad (for serving)