Preheat oven to 350 degrees and grease a 9x13-inch baking dish.

Place potatoes (after they have been washed, peeled and diced) into a large pot. Fill pot with just enough water to cover the potatoes. Add a pinch of salt to the water.

Bring water to a boil and allow to cook until tender (you should be able to pierce the potatoes with a fork and they will start to fall to pieces) about 15-20 min.

Drain your potatoes and place them back into the empty pot.

Add mayonnaise, 1 cup of bacon and 2 cups of shredded cheese to the potatoes and stir until well combined.

Pour the potatoes into the baking dish. Top with the remaining ½ cup of bacon and 1 cup of cheese.

Bake for 30 minutes or until cheese is melted on top and the dish is warm throughout.

Remove from the oven, garnish with green onions if desired and serve.