Persian Herb Frittata (Kuku Sabzi)

Ingredients

• • 1 leek, chopped
  • 8 green onions, chopped
  • 3 tbsp (45 ml) olive oil
  • 2 cups (90 g) parsley, finely chopped
  • 2 cups (90 g) cilantro, finely chopped
  • 1 cup (45 g) dill, finely chopped
  • 2 cups (60 g) spinach, finely chopped
  • 1 cup (50 g) lettuce, finely chopped
  • 5 eggs
  • 1/2 tsp turmeric
  • 1/2 tsp salt
  • 1/2 tsp black pepper
  • 1/2 cup (50 g) whole walnuts
  • 1 tbsp dried unsweetened cranberries (optional) or barberries (see note)