Apple remoulade

Ingredients

• 1 green apple, cut into matchsticks
• Juice ½ lemon, plus extra
• 2 celery sticks, 1 finely chopped, 1 finely sliced
• 1 tbsp capers in brine, rinsed
• ½ garlic clove, finely crushed
• 2 tbsp greek yogurt
• 1 tbsp mayonnaise
• 1 tsp dijon mustard
• 2 tbsp finely chopped fresh flatleaf parsley leaves