Add the chopped cabbage and diced onion to the butter and fry until the cabbage is almost transparent. Use a pancake turner to flip the cabbage often to avoid burning.
Prepare the potatoes and noodles: Add potatoes to boiling, salted water and boil them for 20 to 30 minutes or until you can easily cut them with a fork. Meanwhile, boil a 4 quart saucepan of water and add noodles. Boil the noodles for at least 10 to 15 minutes or until done.
Drain the potatoes and noodles and add them to the cabbage, onion, and butter.
Season the dish with garlic, salt, and pepper to taste and simmer for another 5 to 10 minutes to allow the flavors to blend.