Chop celery, carrots and onion and put in pan with a drop of olive oil and clove of garlic and start sauteing for about 5 minutes
Clean your shrimps and keep only the shells. Use your shrimps for some other dish...
Add your shells to the cooking pot and sauté for 5 minutes
Add tomato paste and keep stiring
Add 1/4 cup of rice
A drop of white wine
Cover the food with double the amount of cold water and simmer for 2 hours
Drain in chinois
And your bisque is ready to use...