tuna pita sandwich

Serves: 2

Ingredients:
2 tablespoons plain low- fat yogurt
2 teaspoons chopped fresh dill
2 teaspoons lemon juice
½ teaspoon grated radish
¼ cucumber finely diced
½ teaspoon cumin powder
1 can shredded tuna(drained)
to serve:
1 whole-wheat pita
½ cup watercress

Method:
combine yogurt, dill, lemon juice, grated radish , cucumber and cumin powder in a small bowl; stir in tuna.
stuff the pita half with the tuna mixture and watercress.