Peel and chop and rinse potatoes. I prefer them cut round or diced

Cut onion round less than 1/4 inch slices.

Layer in a 2 Qt casserole dish.

Add butter every other layer

Add garlic salt and cracked black pepper to taste.

Place the lid on the casserole dish and cook in microwave for 20 minutes or until the potatoes are tender.

Stir about every 10 minutes to evenly distribute butter.

Add american cheese or sour cream after cooking is complete. (optional)