Roasted Salmon with White Bean Ragout

Name: Roasted Salmon with White Bean Ragout
Ingredients: 2 tablespoons olive oil, divided; ¾ cup chopped onion; ¾ cup chopped red bell pepper; 3 tablespoons tomato paste; 1 teaspoon salt, divided; ¾ teaspoon ground pepper, divided, plus more for sprinkling; 2 cups coarsely chopped chard; 2 (15 ounce) cans no-salt-added cannellini beans (white kidney beans), rinsed and drained; ½ cup reduced-sodium chicken broth or vegetable broth; 8 (4 ounce) fresh or frozen skinless salmon fillets, thawed; 2 cups halved cherry tomatoes; 8 teaspoons grated Pecorino Romano cheese