My mom created this over 10 years ago using Aidell's Chicken Apple Sausage. it has been a family favorite ever since. I had over 50 foster kids during that time and I can't think of one that did not like it and want seconds.
In large skillet heat oil on medium high heat. Add the onions and briefly sautee (2-3 minutes). Layer the potatoes on top of the onions. Sprinkle with a light layer of garlic salt. Once they start browning, turn down heat to medium while you layer on top the cabbage then the sausage slices.
Once layered cover with lid and lower heat to medium low. Let it continue to cook unstirred for 15 minutes. Remove lid and check if potatoes are browned. If not replace lid and cook undisturbed until golden browned. When browned stir to allow some of the cabbage and sausage to rest at the bottom of the pan. Taste cabbage at this time and if needed add more garlic salt to taste. Cover and cook until cabbage is cooked or to your satisfaction, stirring occasionally.