In a large skillet, crumble and brown the sausage, then drain off the grease.
2 16oz pkg ground sausage
Cut potatoes into fat ¼" slices and boil for 10-15 minutes. Take care not to over cook the potatoes. They should be a little hard as they will continue to cook when you bake the casserole.
5 lb Yukon Gold potatoes
Then, rinse them with cold water so that you can easily handle the slices.
In a mixing bowl, combine the cream of potato soup with the milk, whisk together. Season with salt and pepper to taste.
2 10.5 oz cans cream of potato soup, 1½ cups milk
Butter a 9×13 casserole dish. (Alternatively, you can use (2) 8x8 or 9x9 pans).
Begin layering the ingredients in this order: sauce on bottom, potatoes, sausage, cheese, and repeat until dish is full.
cheddar cheese, shredded
Pour the remaining sauce mixture over the top.
Crush the crackers and sprinkle them over the top.
buttery crackers such as Ritz
Drizzle melted butter over the top, then finish off with a bit more cheese.
2 tablespoons butter, ¾ cup cheddar cheese, shredded
Cover with tinfoil and bake at 350-degrees F for 45-60 minutes until bubbly.
Remove the tinfoil and bake another 5-8 minutes to allow top to brown.