Blackened Salmon with Lima Bean Smashed Potatoes

Name: Blackened Salmon with Lima Bean Smashed Potatoes
Ingredients: 1 pound baby red-skinned potatoes, halved or quartered; Kosher salt; 1 1/2 cups frozen baby lima beans (about 6 ounces), thawed; 1/2 cup fat-free sour cream; 2 tablespoons unsalted butter; Freshly ground black pepper; 1 tablespoon paprika; 2 teaspoons chopped fresh thyme; 1 teaspoon cayenne pepper; 4 skinless center-cut wild salmon fillets (about 4 ounces each); 1 tablespoon vegetable oil; 3 scallions, sliced; Lime wedges, for serving