Heat oil over med-high heat in a large skillet.
Add mushrooms and garlic, and sauté for 5 minutes.
Then, add chicken and cook for another 5 minutes until browned.
Add Italian seasoning, balsamic vinegar and season with salt and pepper to your taste.
Add in bell pepper, asparagus and zucchini, and cook for an additional 10 minutes or until veggies are tender and everything is cooked through.
