Sweat the vegetables and crab pieces in the butter until the vegetables are tender. Add the bouquet garni, tomato paste, Cognac, wine, and stock. Stir and bring to a boil. Then add the rice and simmer for 45 minutes with the lid a little askew.
Strain off the liquid through a fine sieve and reserve. Discard the large, tough pieces of crab shell, then pulverize the remaining contents of