Season chicken with garlic powder, salt, and pepper.

Heat a large skillet over medium high heat.

Spray with cooking spray; cook chicken and onions together.

Lower skillet heat to a medium and add ½ teaspoon of olive oil.

Add mushrooms and season with more salt and pepper.

Serve as is or over a bed of rice or quinoa (just remember to add the points if you pair it with a side dish).