Chop the onion strips, fry lightly, add mushrooms - finely chopped, and sauté. They add soy sauce. Once stifled mushrooms, add chicken breasts, cut into small cubes. Stew for about 10-15 minutes. Once ready, sprinkle with grated cheese and garnish with lemon slices. Serve warm. The dish is cooked in hot plate or in a large Teflon pan and Cover with a lid.