Kuku Sabzi (Persian Herb Frittata) Recipe

Ingredients

• 3 tablespoons olive oil, divided
• 3 1/2 ounces fresh flat leaf parsley (about 1 bunch)
• 3 1/2 ounces fresh cilantro (about 1 bunch)
• 3 1/2 ounces fresh dill (about 1 bunch)
• 5 scallions, dark green part only
• 1 1/2 ounces baby spinach (a generous handful)
• 2 cloves garlic
• 6 large eggs
• 1/2 teaspoon ground turmeric
• Zest of 1 lime (about 1/2 packed teaspoon)
• 1 tablespoon all-purpose flour
• 1/2 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper
• 2 tablespoons dried barberries, plus more for serving
• 1 tablespoon chopped raw walnuts, plus more for garnish