Sicilian Caponata Recipe with Baked Cod

Name: Sicilian Caponata Recipe with Baked Cod
Ingredients: ¼ cup olive oil (divided); 1 medium white onion (diced); 2 large celery stalks (diced); 2-3 garlic cloves (minced); 1 medium eggplant (aubergine, peeled and cubed); 2 medium tomatoes (diced); 2 Tbsp tomato paste (tomato purée); 1 cup tomato passata; 3 Tbsp red wine vinegar; 2 Tbsp capers; ¼ cup green olives (pitted and sliced); ¼ cup raisins; 4 6-oz/170g cod fillets; 3 Tbsp fresh parsley leaves (chopped, divided); 3 Tbsp sliced almonds (toasted, divided); Sea salt and black pepper (to taste)