Easy caponata - Good Food Middle East

Ingredients

• 1 large onion, finely chopped
• 2 celery sticks, finely chopped
• 1 red pepper, peeled and chopped
• 1 yellow pepper, peeled and chopped
• 5 garlic cloves - 4 sliced and 1 halved, to serve
• 5 tbsp olive oil, plus extra to serve
• 100g chargrilled aubergines from a jar, pot or deli counter, drained if in oil and roughly chopped
• 400g can chopped tomatoes
• 1 tbsp small capers
• handful green olives, chopped
• 1 tbsp red wine vinegar
• 1 tsp caster sugar
• large baguette, thickly sliced and toasted, to serve