Mom's Au Gratin Potatoes

Place potatoes into a large pot and cover with salted water; bring to a boil. Reduce heat to medium-low and simmer until tender about 20 minutes. Drain and cool. Peel and slice potatoes into thin rounds.

Melt butter in a saucepan over medium heat. Saute green onions in hot butter until tender 3 to 4 minutes. Stir sour cream condensed chicken soup Cheddar cheese and salt into onion mixture until completely combined.

Preheat oven to 375 degrees F (190 degrees C).

Arrange potato slices in the bottom of an 8x8-inch baking pan. Pour cheese sauce over potatoes.

Bake in the preheated oven until brown around the edges about 45 minutes.