Red Curry–Roasted Salmon and Sweet Potatoes

Name: Red Curry–Roasted Salmon and Sweet Potatoes
Ingredients: 2 pounds sweet potatoes , unpeeled, cut into ¾-inch-thick rounds; 3 tablespoons vegetable oil , divided; 1½ teaspoons table salt , divided; 1 teaspoon pepper , divided; 4 (6- to 8-ounce) skinless center-cut salmon fillets , 1 to 1½ inches thick; 1 (14-ounce) can coconut milk , divided; 3 tablespoons red curry paste , divided; 1 tablespoon sugar; 1 tablespoon fish sauce; 1½ tablespoons lime juice , plus lime wedges for serving; ½ cup cilantro leaves , basil leaves, and/or thinly sliced scallions