Whole wheat spaghetti: 40g (dry), Tuna (canned in water, drained): 85g (3 oz), Cherry tomatoes: 100g (1/2 cup, halved), Capers: 10g (1 tbsp), Garlic: 3g (1 clove, minced), Red onion: 30g (1/4 cup, thinly sliced), Lemon juice: 5ml (1 tsp), Olive oil: 5ml (2 tsp), Red pepper flakes: 0.2g (1/8 tsp), Fresh parsley: 5g (1 tbsp, chopped), Salt and Black pepper: to taste