Prepare rice in boiling salted water according to package instructions. Heat oil in a pan. Wash the chicken fillet, dab dry and fry in the oil for 2-3 minutes on both sides. Season meat with salt and pepper, remove from the pan, wrap in aluminium foil and keep warm.
Sauté the diced carrots and onions in the frying pan, then add the tomato paste and pour in the stock and cream. Simmer sauce for 3-4 minutes and puree. Add half of the basil and season to taste with salt and pepper.
In the meantime melt margarine in a pot and briefly sauté the vegetables in it. Add 3-4 tablespoons of water and some salt and cook covered for about 3 minutes. Drain the rice, add to the vegetables and season with salt and pepper.
Cut the chicken into slices and arrange on the rice with the sauce. Sprinkle with basil strips.