Light the Aquaforno, or prepare equipment to fry in a skillet, boil water, and preheat a camp oven to 350 degrees F (180 degrees C).
Heat a skillet over medium heat then add the diced bacon and onions. Cook until the onions are translucent and the bacon is crisp, this takes about 7 minutes Put aside until needed.
In a large bowl add the dehydrated potato then start to add the hot water until a thick but smooth mashed potato is created.
Add to the mashed potatoes the cream, salt, and pepper, then stir to well combine.
Add three quarters of the cooked bacon and onions, as well as three quarters of the cheddar, mozzarella, and Parmesan cheese to the mashed potatoes. Lightly fold through then transfer to the square baking tray.
Evenly spread the remaining bacon, onions, cheddar, mozzarella, and Parmesan across the top of the potatoes.
Bake the loaded mashed potatoes for 20 minutes or until all the cheeses on the top are melted. Serve immediately.