Robin'S Salmon Bisque

Ingredients

• 1/2 cup butter
• 2 cups sliced leeks
• 1/2 lb sliced mushrooms
• 1 tablespoon crushed garlic
• 46 ounces clam juice or 46 ounces fish stock
• 4 cups canned crushed tomatoes in puree
• 1/2 cup chopped fresh parsley
• 2 teaspoons dried dill weed
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 4 cups salmon, boned and cut into 1/2 inch cubes
• 4 cups cream
• 1/4 cup flour
• fresh dill sprig (to garnish)