In a small bowl combine chicken pieces, soy sauce and oil. Blend to cover chicken and set aside for 5 minutes.
Bring 1 cup of water in microwave to a boil and place chicken bouillon cube in and stir well.
In a electric skillet or large pan, add broccoli and 1/2cup of chicken broth. Simmer on medium low for 5 minutes. Push up side of wok.
Increase heat to medium high and add chicken pieces and sprinkle dash of garlic powder over chicken. Stir fry til tender. Push up beside broccoli.
Add margarine, let melt and add sliced mushrooms. Stir fry til tender.
Bring chicken, broccoli, and mushrooms down from sides and add bamboo shoots and stir all together.
Combine lemon juice, cornstarch,1/2c chicken broth, stir to blend and pour over stir fry mixture. Heat til thicken, stirring constantly for 2 minutes.
Add sesame seeds and Serve over white cooked rice or chow mein noodles.