Salmon with Swiss Chard and Couscous

Name: Salmon with Swiss Chard and Couscous
Ingredients: For the Lemon Chive Beurre Blanc; 2 shallots, chopped fine; 1 cup white wine; 1/4 cup lemon juice; 1 tablespoon heavy cream; 12 tablespoons (1 1/2 sticks) cold unsalted butter, cubed; Salt and white pepper to taste; Snipped chives; For the Swiss Chard, Salmon and Couscous; 1 bunch Red or Rainbow Chard; 1 tablespoon Olive oil; 1/2 Onion, chopped; Salt and Pepper to taste; 1 8 ounce box Israeli couscous; 2 6 to 8 ounce center cut salmon fillets, skinned; 1/2 tablespoon olive oil; 1/2 tablespoon unsalted butter; Kosher salt or course sea salt