Greek salad

Ingredients

• 1 cucumber, halved lengthways, deseeded and diced
• 1 large onion, thinly sliced
• 6 plum tomatoes, cut into chunks
• 24 pitted Greek black olives, halved
• 225g feta, diced
• 1 head cos lettuce, torn

For the dressing

• 2 tbsp fresh lemon juice
• 6 tbsp extra-virgin olive oil
• 1 garlic clove, crushed
• 2 tbsp fresh oregano or thyme