Shrimp Bisque

Shrimp Bisque (Terri's version)
Ingredients
1 and a 1/2 pounds large shrimp, peeled and deveined,
4 cups seafood stock
3 tablespoons good olive oil
2 cups chopped leeks, white and light green parts (3 leeks)
1 tablespoon chopped garlic (3 cloves)
Pinch cayenne pepper
1/4 cup Cognac or brandy ( I use more stock for the brandy but did use the sherry )
1/4 cup dry sherry
4 tablespoons (1/2 stick) unsalted butter
1/4 cup all-purpose flour
2 cups half-and-half
1/3 cup tomato paste
2 teaspoons kosher salt
1 teaspoon freshly ground black pepper
Directions
Place seafood stock in a saucepan heat.
Meanwhile, heat the olive oil in a large pot or Dutch oven. Add the leeks and cook them for 10 minutes over medium-low heat, or until the leeks are tender but not browned. Add the garlic and cook 1 more minute. Add the cayenne pepper and half of the shrimp and cook over medium to low heat for 3 minutes, stirring occasionally. Add the Cognac and cook for 1 minute, then the sherry and cook for 3 minutes longer. Transfer the shrimp and leeks to a food processor fitted with a steel blade and process until coarsely pureed.
In the same pot, melt the butter. Add the flour and cook over medium-low heat for 1 minute, stirring with a wooden spoon. Add the half-and-half and cook, stirring with a whisk, until thickened, about 3 minutes. Stir in the pureed shrimp, the stock, tomato paste, salt, and pepper and heat gently until hot but not boiling. Chop the other half of the shrim into bite size pieces and add to soup.Season, to taste, and serve hot.

I used peeled and deveine shrimp so I skipped cooking the shells and just made all stock.