BOUILLABAISSE

Steps:

• Remove gills and any traces of blood from fish heads. Thoroughly wash fish bones; cut them into lengths that will fit inside 12-quart stockpot. Set aside.
• Cut leeks into quarters lengthwise; slice 1/4 inch thick. Place in a small bowl of cold water; let soak 5 to 10 minutes to remove dirt and sand. Drain; set aside.
• Make a bouquet garni: Cut dark-green leek leaves into two 5-inch lengths. Arrange tarragon and parsley sprigs in center of one leaf. Place other leaf on top to enclose tarragon; tie with kitchen string.
• Roast seeds: Heat a small skillet over medium heat until very warm. Add coriander, fennel, and cumin seeds to warm skillet. Cook, shaking pan or stirring frequently, until toasted and fragrant, 2 to 3 minutes. Let seeds cool in a bowl.
• Strain whole tomatoes over small bowl, reserving liquid. Remove seeds; place tomatoes in bowl with liquid. Set aside.
• Heat oil in a 12-quart stockpot over medium heat; add reserved sliced leeks, carrots, celery, onions, garlic, and paprika. Cook until onions become translucent, about 5 minutes. Add reserved whole tomatoes and their liquid, sun-dried tomatoes, saffron, turmeric, harissa, roasted coriander, fennel, and cumin seeds. Stir to combine.
• Raise heat to high, add reserved fish heads and bones, and cook, stirring frequently, until bones are opaque, about 5 minutes. Add fennel branches, orange peel, and bouquet garni. Add water to just cover bones, about 4 quarts. Bring to a boil; skim foam from the surface. Reduce heat; simmer, uncovered, 25 minutes. Pour stock through a sieve into a large bowl; discard solids. Return liquid to pot.
• Meanwhile, bring a large stockpot of cold water to a rolling boil. Quickly add lobsters; cook about 12 minutes. Remove pan from heat. Drain lobsters; submerge in cold water to stop cooking. Drain again.
• Place 1 cup reserved stock in a large saucepan. Add 1 cup water. Bring to a boil; add mussels. Cover; cook until mussels open, 5 to 7 minutes. Remove from heat. Discard any mussels that do not open.
• Meanwhile, place stockpot with stock over medium-high heat; bring to a boil. Reduce heat to simmer. Season with salt and pepper. Add potatoes; cook until just tender, about 20 minutes. Add fish fillets; cook until opaque and cooked through, 3 to 5 minutes more. Remove tails and claws from lobsters (discard bodies or reserve for other use). Crack open claws and tail; add with mussels to pot; cook just long enough to warm. Serve with rouille and toasted French bread rounds.