Broth: In a medium sauce pan, slowly roast 3 cups of shrimp heads and shells in a small amount of oil until crisp and fragrant. Add all ingredients except water. Reduce by 1/4 and add water to cover the shells by 1-inch. Bring to a boil, reduce to a simmer for 30 minutes. Strain, chill, and reserve.
Rouille: Combine the first 5 ingredients in a bowl of a food processor and process until foamy, slowly drizzle in the oil until thick, season. You want this thick enough to dollop.
Mussels: Place the carrots, fennel and leeks in a medium sauce pan with the saffron broth and the mussels. Cover and steam for 2 minutes or until the mussels have opened (discard any unopened mussels.) Remove mussels and divide among 4 service bowls. Add the tomatoes to the vegetables along with the herbs. Reduce for 4 minutes. Mount in the butter and season. Top each bowl of mussels with vegetables and broth. Mound with a generous dollop of rouille and serve with grilled bread.
Consumption of raw or undercooked eggs, shellfish and meat may increase the risk of foodborne illness.
Recipe courtesy of Chef Anne Kearney