Salmon Corn Chowder

Name: Salmon Corn Chowder
Ingredients: 2 pounds skinless salmon fillets; 2 tablespoons unsalted butter; 2 tablespoons olive oil; 1/3 cups minced shallots; 6 cups low-sodium chicken or vegetable broth; 6 Yukon gold potatoes (about 2 pounds, scrubbed and cut into 1/2 inch cubes); 4 cups corn kernels (from about 8 ears); 1 cup half-and-half; 3 tablespoons minced fresh dill; Kosher or coarse salt and freshly ground pepper to taste; Sliced scallions (for garnish); Crumbled cooked bacon (for garnish)