Cook rice or noodles per package instructions; set aside.
Optionally, cook protein until golden brown; set aside.
Heat vegetable oil in the same pan.
Add frozen stir-fry veggies; cook until tender, stirring occasionally.
Reintroduce protein (if used) and stir.
Pour soy sauce over the mixture; stir to coat.
Cook for an additional 2-3 minutes to meld flavors.
Serve over rice or noodles for a delicious Costco Frozen Vegetable meal.