Stir Fry Chicken With Mushroom & Celery (Ayam Cah Jamur)

Saw big stalks of celery in my fridge sitting there for two days untouched
I can and love to eat them raw but if you ask me to finish them now, I will turn green :p
Decided to cook this simple dish with it instead

What you need:

1 chicken breast, remove skin and bone - diced
1 can button mushroom, cut
5 stalks celery, cut
4 cloves of garlic - crushed
a little oil, approx 500ml water, salt, pepper, a little sugar, cooking wine, cornstarch

Marinade chicken with salt, pepper, wine and a little cornstarch - leave it for at least 1 hour
Fry garlic til fragrant
Add in chicken, mix til chicken changed color
Add in mushroom and water, when its about to boil add in celery
Add salt, pepper, sugar
Dilute cornstarch with a little water
At boiling point, add in the diluted cornstarch
Stir continuously til thickened and well mixed
Off heat