White beans (cannellini, canned, drained): 80g (1/3 cup), Tuna (canned in water, drained): 85g (3 oz), Cherry tomatoes: 50g (1/4 cup, halved), Cucumber: 50g (1/2 cup, diced), Red onion: 20g (2 tbsp, finely diced), Kalamata olives: 20g (5-6, pitted and sliced), Feta cheese (reduced-fat): 20g (1 tbsp, crumbled), Arugula: 30g (1 cup), Olive oil: 10ml (2 tsp), Lemon juice: 5ml (1 tsp), Dijon mustard: 5g (1 tsp), Dried oregano: 1g (1/4 tsp), Fresh parsley: 5g (1 tbsp, chopped), Salt and Black pepper: to taste