Spray the inside of your slow cooker with nonstick cooking spray. This helps prevent the food from sticking.
Layer the bottom of the slow cooker with 3 cups thinly sliced, peeled potatoes.
Drizzle two table spoons of melted butter over the potatoes. Sprinkle ½ teaspoon salt on top.
brown 1 pound ground beef until fully cooked in a pan. Drain any extra fat.
Spread the cooked ground beef evenly over the potatoes in the slow cooker.
mix 1 (10.5 ounces)can of cream of mushroom soup, ½ cup milk, salt, and ground black pepper to taste. Pour this mixture over the beef and potatoes.
Sprinkle 1 cup of shredded sharp Cheddar cheese over the top. Save the rest for later.
Cover the slow cooker and cook on low for 4-6 hours until the potatoes are tender.
About 15 minutes before serving, add the remaining ½ cup of shredded sharp Cheddar cheese on top. Let it melt before serving.