Ingredients

• 2 large garlic cloves, unpeeled
• 1 (1-pound) black cod fillet with skin
• 5 tablespoons olive oil, divided
• 1 red bell pepper, chopped
• 1 green bell pepper, chopped
• 1 preserved lemon,* flesh scraped out and discarded, peel chopped
• 2 tablespoons tomato paste
• 2 teaspoons Hungarian sweet paprika
• 2 teaspoons ground ginger
• 2 teaspoons ground cumin
• 1 teaspoon coarsely ground black pepper
• 1/8 teaspoon turmeric
• 1/4 cup chopped fresh cilantro
• 1/4 cup chopped fresh Italian parsley
• 1 tablespoon harissa sauce**
• 1 bundle rice stick noodles (maifun; half of 6- to 7-ounce package)***
• 12 (18x12-inch) sheets phyllo pastry, thawed if frozen
• Melted butter
• *Lemons that have been soaked in salt and lemon juice for several weeks; available at specialty foods stores and Middle Eastern markets, and from igourmet.com.
• ** A spicy North African red chile paste; available at specialty foods stores and at Middle Eastern markets.
• *** Available in the Asian foods section of some supermarkets and at Asian markets.

Instructions

1. Add enough water to large deep skillet to reach depth of 1 1/2 inches. Add unpeeled garlic cloves and bring water to simmer. Sprinkle fish with salt; add to skillet. Poach fish gently until just opaque in center, about 10 minutes. Transfer fish to plate; cool. Flake fish coarsely; discard skin. Peel and mince cooked garlic.
2. Heat 2 tablespoons oil in large skillet over medium-high heat. Add bell peppers and sauté until beginning to soften, about 4 minutes. Add preserved lemon peel, tomato paste, paprika, ginger, cumin, black pepper, turmeric, and minced garlic. Sauté 5 minutes to blend flavors. Remove from heat; mix in cilantro, parsley, harissa, and remaining 3 tablespoons oil. Cool mixture. Gently stir in flaked fish.
3. Cook rice noodles in large saucepan of boiling salted water until just tender, stirring occasionally, about 5 minutes. Drain; rinse under cold water to chill quickly. Cut noodles into 1-inch pieces. Stir noodles into fish mixture and season filling to taste with salt.
4. Line 2 large rimmed baking sheets with parchment paper. Place 8-inch plate on work surface. Place 1 phyllo sheet over plate, centering plate underneath. Fold another phyllo sheet in half, brush with butter, then fold in half again and place in center of phyllo over plate. Mound 1 cup fish filling on folded phyllo; shape filling into 5-inch-diameter round. Fold 1 corner of phyllo sheet over filling. Continue to lift and fold edges of phyllo sheet over filling at 6-inch intervals, brushing each fold with melted butter and covering filling completely. Turn b'stilla onto parchment-lined baking sheet, seam side down. Brush all over with more butter.
5. Repeat with remaining phyllo and filling, making 6 b'stillas total. DO AHEAD: Can be made 6 hours ahead. Refrigerate.
6. Preheat oven to 400°F. Bake b'stillas until heated and pastry is golden brown, reversing sheets after 12 minutes, 18 to 20 minutes. Transfer to platter.