Tomato carpaccio with celery and cheese

Name: tomato carpaccio with celery and cheese
Total time: 20 min
Yield: 4
Ingredients: 6 vine tomato ripe, in very thin slices; 75 gram lamb's lettuce; 75 gram arugula; 150 gram celery strips drained, jar; 50 gram walnuts coarsely chopped; 100 gram extra mature cheese in strips; chives; 3 tablespoon low fat yogurt; 2 tablespoon halvanaise; teaspoon mustard; 1 mespoint curry powder