Salmon with Couscous and Peas

Name: Salmon with Couscous and Peas
Ingredients: 4 skin-on center-cut wild salmon fillets (about 1 inch thick; 5 ounces each); Kosher salt and freshly ground pepper; 2 teaspoons extra-virgin olive oil; 1 small white onion, finely chopped; 1/2 cup frozen peas; 3/4 cup low-sodium chicken broth; 1/3 cup sliced pitted Spanish olives with pimientos; 1/4 cup golden raisins; 2 tablespoons salted roasted pepitas (green pumpkin seeds); 1 tablespoon hot sauce; 1/2 cup couscous; Lime wedges, for serving