Creamy Lobster Bisque

Name: Creamy Lobster Bisque
Ingredients: 2 pounds one lobster carcass (little broken bits discarded, but keep the body with all the guts); 1 tablespoon tomato paste; 2 tablespoons sun-dried tomatoes in oil, well chopped; 1/2 cup chopped sweet onion (I use Mayan); 1/4 cup chopped celery; 1 small red potato, washed well, skin on; 1 large clove garlic, finely chopped; 1 teaspoon saffron; 2 dashes of fish sauce (Asian fermented fish sauce; 2 tablespoons olive oil; 1/2 litre of vegetable stock (low sodium); 1/2 cup to 1 cup evaporated milk; salt and pepper to taste