Add rice to boiling vegetable stock, bring to the boil again briefly, cover and allow to swell over a low heat for about 20 minutes. In the meantime, wash the sprouts thoroughly and let them drain well on a sieve. Clean, wash and cut the tomatoes into pieces. Dice cheese. Cut off the tops of the peppers, unscrew the strunck. Clean and wash the peppers. Peel onion and garlic and dice very finely.
Pour rice on a sieve, rinse with cold water and drain well. Clean and wash the rocket, dab dry and pluck half into bite-sized pieces. Mix rice, sprouts, cheese, onion, tomatoes and plucked rocket. For the marinade, mix mustard, garlic, salt, pepper, sugar, vinegar and soy sauce. Whip the oil into it. Pour the marinade onto the rice-vegetable mixture and leave to soak for approx. 30 minutes. Fill the rice salad into the peppers, place the lid on top and place the remaining rocket in the stem of the lid