Tuna Lemon Cups

Ingredients

• 6 large lemons
• 185 g tuna in springwater, drained
• 100 g cream cheese, softened
• 2 tbsp mayonnaise
• 1 tsp Dijon mustard
• 1 tbsp capers, finely chopped
• 1 small stick celery, finely diced
• 1 tbsp finely diced red onion
• Zest of 1 lemon
• 1 tbsp parsley, finely chopped plus extra for garnish
• Salt, to taste
• Freshly ground black pepper, to taste