Fast Italian Fish Stew

Name: Fast Italian Fish Stew
Ingredients: 4 6-oz. skin-on halibut fillets; 1 teaspoon kosher salt, divided; ½ teaspoon freshly ground black pepper, divided; 6 tablespoons olive oil, divided; 2 tablespoons drained capers; 2 cloves garlic, thinly sliced; 2 pints cherry tomatoes, halved; 2 15-oz. cans cannellini beans, drained and rinsed; ½ cup low-sodium chicken stock; ½ teaspoon lemon zest plus 2 tsp. fresh juice (from 1 lemon); ¼ cup chopped fresh flat-leaf parsley leaves, divided; ¼ cup chopped fresh basil leaves, divided