Cook the rice in boiling salted water for about 30-40 minutes according to package instructions. Clean and wash celery, put aside light celery green. Cut celery into pieces about 1 cm wide. Clean the mushrooms and cut them into wide strips. Peel and halve the onion and cut into thin strips
Heat the oil in a frying pan. Add the mushrooms and fry over high heat until golden brown. Reduce heat, add celery and onion. Season with salt, pepper and coriander. Fry for about 3 minutes while turning.
Add lemon juice and cook for another 3-5 minutes. Add soy cream, bring to the boil briefly, season with soy sauce. Chop the celery green roughly. Arrange vegetables and rice, sprinkle with celery green and freshly ground pepper and garnish with lemon slices