Chopped Green Salad - Vickery TV

Ingredients

• 0.5 large cucumber
• 4 spring onions
• 3 sticks of celery
• 2 Little Gem lettuce
• 50 g spinach
• 50 g watercress
• 1 punnet mustard and cress
• 1 egg yolk
• 2 tbsp Dijon mustard
• 1 tsp caster sugar (level)
• salt and freshly ground black pepper
• 4 tbsp sherry vinegar
• 3 tbsp extra virgin olive oil
• 3 tbsp safflower or sunflower oil
• dash water if needed