Tuna may not be as as rich as salmon or mackerel in the omega-3 essential fats but for many it wins out in taste. It's a great source of protein especially in this low carb dinner. Ingredients 20 ml Yoghurt - Low Fat Natural 12 green beans 6 cherry tomatos 1 handful salad Leaves 1 sprigs fresh parsley 1/4 red onion 1/2 Zest of a Lemon 100 g Tuna - Fresh Method Boil some salted water in a pan and cook the green beans until tender, then drain and place them in a bowl. Add the halved cherry tomatoes, sliced red onion, chopped parsley, a little olive oil, salt and pepper and mix well. In another bowl mix the yoghurt with the lemon zest and a little salt and pepper to taste. Preheat a frying pan to high and sear the tuna for 1 minute on each side (more if you prefer well cooked). To serve, first place the salad leaves on a plate, then add the green bean salad and pan-fried tuna steak and top it off with the lemony yoghurt.