Cod Focaccia Sandwich With A Red Tomato Sauce

Name: Cod Focaccia Sandwich With A Red Tomato Sauce
Ingredients: 3 tablespoons olive oil; 1/2 teaspoon salt; black pepper to taste; 1 1/2 pounds cod fish fillets, cut into smaller pieces (about 680 grams); 1/4 teaspoon salt; 2 teaspoons paprika powder; 1 teaspoon dried basil; 1/2 teaspoon crushed red pepper flakes (or more to garnish); 3 tablespoons olive oil (plus 1/4 teaspoon, separated to drizzle on bread); 3 garlic cloves (finely chopped); 1/3 cup chopped cilantro (20 grams and more for garnish); 1 (7-ounce-200 gram) can tomato paste; 1/3 cup vegetable broth; 2 large squared focaccia breads (sliced in half, or more if needed)