Add potatoes, salt, mustard, cheddar, cottage cheese, green onions, beaten eggs, hot sauce, bacon pieces, evaporated milk, garlic powder, and pepper to a large bowl and stir well to combine.

Pour and spread into a greased 9x13" baking dish, cover with foil, and place in the refrigerator over night or for at least 5 or 6 hours.

Preheat oven to 350 degrees Fahrenheit, remove cover, and bake for approximately 40 minutes, or until eggs are cooked. Sprinkle with reserve bacon for the last five minutes' cooking time.