Cabbage Potato dish

Okay, so i'll admit that this dish doesn't look very nice, but it does taste yummy. It's dutch and Justin's Grandma showed me how to make it. It's good for a tight budget, it makes a ton, and it taste really good as leftovers, too (I think better than day 1). I also love cabbage so this made it extra yummy.

3 med potatoes
1 head of cabbage, chopped up/shredded
1 onion
approx 1 cup cheese, any kind (really whatever you have, and any amount, see what you like.)
ketchup
any tomato product (canned, salsa, verde...anything!)

Peel and cut up the potatoes into bite size pieces and boil.
While that is boiling cut up and saute the onion in a wok with a little oil or butter.
Add the cut up cabbage (it will fill the wok, it makes a lot, but it also cooks down!) and some water, half cup or whatever you need so it doesnt stick or burn.
Let that cook down then add the potatoes, cheese, some ketchup or tomato product and stir. It will be saucey, which is nice. The cheese will get stringy. It's kind of a stew, but not. Either way it tastes good and it's cheap to make!