Tomato, cucumber and onion relish

Ingredients

• 225g/8oz tomatoes, chopped into small pieces
• 225g/8oz cucumber, peeled and cut into small pieces
• 100g/4oz red onion, finely diced
• 2 green chillies, deseeded and finely chopped
• 2.5ml/½ tsp salt
• 1.25ml/¼ tsp sugar
• 3 tbsp fresh lemon juice
• 2 tbsp fresh coriander leaves, chopped