In a wok, heat the olive oil to medium heat then toss the chicken into the oil.
Stir fry until cooked through. Add the garlic and allow it to cook for a moment before sprinkling the mixture with the chicken boullion powder and soy sauce.
In small cup, whisk together the cornstarch and water (use more water if you like a thinner sauce, or less water for a thicker sauce). Pour this mixture over your chicken, stir to coat, then add the broccoli.
Cover and cook just until the broccoli is a bright green. Toss in the cashews and serve over Udon noodles or rice.
Enjoy!