Fresh Herb and Egg Casserole

Ingredients

• 6 large eggs
• 1 teaspoon baking powder
• 1 tablespoon flour
• 1 teaspoon Persian allspice (advieh; see note) -- or 1/2 teaspoon cumin,
• 1/4 teaspoon cinnamon, and 1/4 teaspoon cardamom
• 1 teaspoon salt
• 1/4 teaspoon freshly ground pepper
• 2 cloves garlic, peeled and crushed
• 1 cup finely chopped scallions
• 1 cup finely chopped parsley leaves
• 1 cup finely chopped fresh coriander leaves
• 1 cup snipped fresh dill
• 1 tablespoon dried fenugreek (optional)
• 2 tablespoons dried barberries (sour berries in Middle Eastern grocery stores), optional
• 3 tablespoons unsalted melted butter