Fresh spinach can be stirred into this recipe at the end. Frozen vegetables like peas, carrots, corn or even spinach can be defrosted in the microwave, drained of any water and then added at the end.
But make sure you open one and check that the chicken juices run clear (not pink) before feeding people. Microwave onions for 1 minute. Cut the chicken breasts off the bone, then cut into 2cm cubes, ...