Wild Salmon Chowder

Name: Wild Salmon Chowder
Ingredients: 1/2 lb. wild salmon filets (skinless *see notes on how to skin salmon*); 2 tbsp olive oil; 1 tbsp butter; 1 small onion (chopped, 1 cup); 2 cloves garlic (chopped); 1 celery stalk (chopped, 1/4 cup); 1 small fennel bulb (chopped, 1 cup); 1/2 tsp sea salt; 2 sprigs fresh thyme; 1/4 cup dry vermouth (or white wine); 24 ounces fish stock (or chicken or vegetable stock); 2 cups fingerling potatoes (cut into 1 pieces); 1/4 tsp black pepper; 1/4 cup heavy cream; 1/2 cup fresh dill, chopped