Pork Paprikash with Cauliflower Rice

Name: Pork Paprikash with Cauliflower Rice
Ingredients: 1 (1 pound) natural pork tenderloin; 6 cups chopped cauliflower (1 1/2 pounds); 2 tablespoons olive oil, divided; ⅛ teaspoon salt plus 1/4 teaspoon, divided; 1 medium onion, cut into thin wedges; 1 ½ tablespoons paprika plus more for optional garnish; ½ teaspoon ground pepper; 1 (14.5 ounce) can no-salt-added diced tomatoes with basil, garlic, and oregano, undrained; 1 cup reduced-sodium chicken broth; ¼ cup bottled mild banana peppers, finely chopped; ⅓ cup light sour cream (Optional); 2 tablespoons all-purpose flour; 8 teaspoons light sour cream (Optional)