This is so easy and will serve three or four.
Mushrooms
1 chicken breast
2 dsp Oyster sauce
2 dsp Soy sauce
Sherry/rice wine - glug
Cornflour paste
Water
Rice or noodles
Stir-fry veg
Oil
Cut the chicken breast into small cubes and fry till cooked: set aside. In the same pan fry the mushrooms for a minute, add the soy and oyster sauces and cook for 30 seconds then add a good glug of Sherry and enough water to cover and cook for a few mins. Put the chicken back in the fry pan or wok with the mushrooms, add the cornflour paste and cook out till thickened.
Serve on a bed of noodles/rice and stir-fry veg.