Canned tuna (in water, drained): 85g (3 oz), Avocado: 150g (1 medium), Greek yogurt: 30g (2 tbsp), Celery: 30g (1 stalk, finely diced), Red onion: 20g (2 tbsp, finely diced), Lemon juice: 10ml (2 tsp), Dijon mustard: 5g (1 tsp), Fresh dill: 5g (1 tsp, chopped), Salt: to taste, Black pepper: to taste, Mixed greens: 50g (2 cups, optional for serving)