Smoked Salmon Chowder

Name: Smoked Salmon Chowder
Ingredients: 1 tablespoon unsalted butter; 1 tablespoon extra-virgin olive oil; 1 medium leek, cleaned, trimmed and thinly sliced; 1 medium carrot, peeled and diced; 1 rib celery, trimmed and diced; 1 clove garlic, peeled and minced; 1 large, starchy potato, peeled and cut into small cubes; 2 teaspoons fresh thyme leaves; 1/4 cup all-purpose flour; 1/2 cup dry white wine; 1 1/2 cups chicken stock, either homemade or low-sodium; 1 bay leaf; 2 cups whole milk; 4 ounces smoked salmon, flaked; 3/4 cup heavy cream; Freshly ground black pepper to taste; Fresh chives, minced, for garnish