Salad Nicoise

Ingredients

• 225g/8oz French beans, trimmed
• 450g/1 lb new potatoes, peeled and cut into 2.5 cm/1in pieces
• White wine vinegar and olive oil, for sprinkling
• 1 small cos or round lettuce
• 4 ripe plum tomatoes, quartered
• 1 small cucumber, peeled, seeded and sliced
• 1 green or red pepper, thinly sliced
• 4 eggs, hard-boiled, peeled and quartered
• 24 black olives
• 225g/8oz can tuna in brine, drained
• 50g/2oz can anchovies, drained
• basil leaves, to garnish
• 15ml/1 tbsp Dijon mustard
• 1 garlic clove, crushed
• 60ml/4 tbsp lemon juice
• 120ml/4fl oz/½ cup sunflower oil
• 120ml/4fl oz/½ cup extra virgin olive oil
• Salt and ground black pepper