1. Sauté onion in 1 Tbsp. hot oil in a saucepan over medium heat 2 minutes or until slightly softened. Add beans, olives, and tomatoes; cook over medium heat, stirring occasionally, 2 minutes or until thoroughly heated. Remove from heat, and stir in basil.
2. Sprinkle salmon fillets evenly with salt and pepper. Cook salmon in a large nonstick skillet in remaining 1 Tbsp. hot oil over medium-high heat 3 minutes on each side or until fish flakes easily. Spoon bean mixture evenly over salmon fillets, and serve immediately. Garnish, if desired.