Stir Fry Vegetables - cooking recipe

Ingredients

2 tablespoons vegetable oil
1/2 cup chopped onion
1 lb chicken breast, cut in strips (marinate in soy sauce and garlic for great flavor)
2 cups cauliflower, cut to florets
2 cups broccoli, cut to florets
1 red bell pepper, sliced
1 yellow bell pepper, sliced
1 cup celery, sliced (2 stalks) (optional)
1 (15 ounce) can baby corn
salt (to taste)
soy sauce (optional)
Sauce
1 tablespoon oyster sauce
1/2 cup water
1 teaspoon cornstarch (just use enough to thicken slightly)

Preparation

Saute onions in oil.
Add chicken and stir fry until browned. If not marinated, season with soy sauce and garlic.
Add vegetables except for baby corn and salt. Stir fry for 3-4 minutes.
Add baby corn and soy sauce to taste, if desired.
Pour sauce over, stir till all vegetables are coated. If more sauce is needed, just double the recipe. I haven't made this in ages, so you might need more. I can't remember.
Sauce: stir all ingredients for sauce together until slightly thickened.