Creamy Fish Chowder

Name: Creamy Fish Chowder
Ingredients: 4 oz. slab bacon, sliced bacon, or salt pork, chopped; 2 tablespoons unsalted butter; 1 large onion, finely chopped; 4 celery stalks with leaves, finely chopped; Kosher salt, freshly ground pepper; 2 large Yukon Gold potatoes (about 1 lb.), peeled, cut into 1/2 pieces; 1 cup clam juice or fish broth; 1 tablespoon fresh thyme leaves; 1 1/2 pounds skinless cod, haddock, or pollock fillets, cut into 2 pieces; 4 cups half-and-half