Creamy Salmon Chowder Recipe

Name: Creamy Salmon Chowder Recipe
Ingredients: 2 tablespoon butter (or olive oil); 2 ribs celery (chopped); 1 large white onion (diced); 3-5 cloves garlic (minced); ½ teaspoon dried thyme; 1 teaspoon salt (plus more to taste); ½ teaspoon black pepper (plus more to taste); ¼ cup all-purpose flour (see notes for substitution); 4 cups low-sodium chicken broth (see notes for substitution); 1 pound Yukon gold potatoes (chopped into 1/2-inch cubes, see notes); 1 bay leaf; 3 cups heavy cream (see notes); 1-2 pounds boneless skinless salmon fillets (cut into 1-inch pieces); 1 tablespoon fresh dill or parsley (minced, optional )