Bring the water with salt to a boil in a saucepan. Pour in the rice and cover and leave to soak for 20 minutes. Drain on a sieve and rinse with cold water. Put in a bowl and let cool. Peel the apples and onions, then dice finely. Quarter, core and wash the peppers and cut into fine strips like the ham and cheese. Rinse and chop the parsley (leave some stalks for garnish). Mix everything with the rice. Mix the wine vinegar with salt, pepper, mustard and oil in a bowl. Pour over the salad. Let the salad steep for 60 minutes. Mix again and season if necessary. Wash the tomatoes and cut out the stalks. Cut the tomatoes and the peeled egg into slices. Serve the salad garnished with tomato, egg slices and parsley.