Cut the chicken breast into 2-3 bits each then marinade in a couple of spoons of soy sauce and dry sherry for about 30 minutes.
Get the wok out and stir fry some onions, chopped up quite fine. Add the chicken, including the marinade and add some chicken stock. When chicken no longer pink add whatever veg you've got (again, sliced or chopped, whichever you prefer) and let it all mingle together for about 10-15 minutes over a medium heat, stirring occasionally. If you want it a bit spicier, add a bit of ginger when you do the onions
At same time, cook (boil) your potatoes.
Should be yummy.