Shrimp bisque made from raw shrimp shells

Ingredients

• 14.1 oz (400 g) uncooked shrimp shells, tails,(cleaned) heads
• 1 medium sized brown onion
• a large tomato
• one white stem of a leek
• 1/2 carrot
• 1/2 fennel
• bunch parsley stems only
• 2 cellery sticks
• 2 1/2 oz (70 g) tomato paste (concentrate)
• 1/4 cup Pernod, Ricard, Rakki or Ouzo (anice liquor)
• 2 cloves garlic ((optional))
• few twigs thyme and/or rosemary
• 1 bay leave
• 1 tbsp sea salt
• 1/2 tsp freshly ground black pepper
• 3 tbsp olive oil
• 15 raw, mid-sized shrimps (may be peeled) ((frozen uncooked also fine))
• 2 tbsp brandy
• 6 cups chicken broth
• 1 tsp sugar
• 5 tbsp white wheat flour
• 4 tbsp butter
• 1/2 cup milk
• 1/4 cup cooking cream