Prepare rice in boiling salted water according to package instructions. Blanch the beans in salted water for about 5 minutes, then rinse under cold water. Peel onion and cut into thin slices.
Wash the tomatoes, grate them dry and cut them in half. Wash parsley, dab dry and cut leaves of 1 stalk into thin strips. Mix yoghurt, some lime juice and curry and season with salt, pepper, sugar and pepper sauce.
Pour rice into a sieve, rinse under cold water and drain well. Mix rice, beans, tomatoes, parsley strips and onion rings, season with salt and pepper. Serve the rice salad with the yoghurt sauce and garnish with parsley leaves.