Season the salmon with salt and pepper. Heat 1 teaspoon olive oil in a large nonstick skillet over medium-high heat. Add the salmon skin-side down and cook until almost cooked through and the skin is dark golden and crisp, about 8 minutes. Flip the salmon and remove the skillet from the heat; let sit until just cooked through, about 5 minutes.
Meanwhile, heat the remaining 1 teaspoon olive oil in a medium saucepan over medium heat. Add the onion and cook, stirring often, until softened, about 5 minutes. Add the peas, chicken broth, olives, raisins, pepitas, hot sauce, 1/2 teaspoon salt and a few grinds of pepper. Increase the heat to high and bring to a boil, then stir in the couscous. Remove from the heat, cover and let sit 5 minutes.
Fluff the couscous with a fork. Serve the salmon with the couscous and lime wedges.