Chop up zucchini, green pepper, mushrooms, tomato, and onion.
Throw all vegetables into pan with frozen meatballs until vegetables are soft and meatballs are warm and cooked. (You can also cook the meatballs in the microwave before putting them in the pan if you want to speed up the process)
Cook the Knorr rice and pasta package according to the instructions (either on the stovetop or in the microwave).
Add rice and pasta mix to the pan with the vegetables and meatballs, add salt and pepper, and enjoy!