I am a potato lover. We often buy the 20 pound bags at Costco. Here is a very simple recipe that feeds a crowd.
Mashed Potato Bake
5 pounds potatoes, cooked and then mashed
8 ounces cream cheese
1 cup half and half
1 stick of butter
1 teaspoon salt
1 teaspoon onion salt
Beat together the cream cheese and half and half. Add the mashed potatoes. Mix well. Add in the butter, salt and onion salt. Pour into large casserole dish. Brush with melted butter. Bake at 350 degrees for 30-40 minutes.
Note: You can use milk instead of half and half. You won't need a full cup.