Cook the rice in plenty of boiling salted water for about 20 minutes, drain. Meanwhile wash the meat, dab dry and cut into fine strips. Clean the leek and peel the carrots. Wash vegetables, cut into fine strips.
Heat the oil in a large frying pan and fry the meat for 6-8 minutes while turning. Add vegetable strips and steam briefly. Add 100 ml broth and reduce slightly over medium heat. Add rice and season to taste with salt and lemon pepper.
Bring the remaining stock, cream and lemon peel to the boil in a saucepan. Bind with sauce thickener. Season sauce with salt, lemon pepper and lemon juice. Arrange the shredded meat in portions on plates and pour the sauce over them.
Garnish as desired with lemon balm.