Heat oil in a nonstick wok, turn to medium low heat. Add frozen rice, frozen peas, frozen green and yellow beans, frozen corn, and frozen chicken stock. Sprinkle salt and pepper over all. Cover and leave on medium low heat for about 15 minutes or until all is defrosted.
Raise heat to medium high; stir to mix. Stir in coriander, cumin, cayene, parsley; stir fry for about 5 minutes. Make a slurry with the cornstarch and water, add to wok; stir to mix, add fresh cherry tomatoes, if using; stir fry for a further 5 to 10 minutes or until veggies are cooked to your liking and most of the liquid is thickened and/or absorbed.