Caponata picnic sandwiches Recipe | Food Network UK

Ingredients

• 4 tbsps olive oil
• 1 celery stalk, chopped
• 1 medium aubergine, cut into 1 1/3-cm pieces
• Salt
• 1 red pepper, cut into 1 1/3-cm pieces
• 1 medium onion, chopped
• 1(415g) tin diced tomatoes
• 3 tbsps sultanas
• 1/2 tsp dried oregano leaves
• Freshly ground black pepper
• 4 tbsps red wine vinegar
• 2 tsps sugar
• 1 tbsp drained capers
• 1 loaf ciabatta bread, cut crosswise into 6 equal pieces
• 2 garlic cloves, peeled
• 6 slices (1-cm-thick) drained fresh water-packed mozzarella