Here is what I do for a quick and easy stir-fry:
In a bowl, mix soy sauce, olive oil, ginger (fresh or powdered), garlic (powdered or minced). Chop a chicken breast and mix in to marinate while you chop the rest.
Chop a few veggies that you like and have in the house. I usually use any of the following: broccoli, carrots, mushrooms, zuccini, red and green peppers, spring onions, raddishes, eggplant, snow peas, baby corn, water chestnuts. I'm sure any vegetable will do, just go with what you like.
Heat some oil in a big frying pan. Fish the chicken out of the marinate and brown in the pan. Throw in the veggies and fry with the chicken until tender enough. I like it a bit on the crunchy side, others may like it a bit more done. Just make sure to add in things like broccoli and carrot a few minutes before the rest as they take the longest to cook. When it is almost all cooked through, add the remaining marinade in and stir fry for a minute or two.
Serve over rice and enjoy.
It's not fancy or complicated, but I think it is very tasty and very quick to make.