01 -
Preheat the oven to 325°F and lightly grease a 9×13-inch baking pan.
02 -
In the prepared baking pan, combine the diced potatoes, shredded cheddar cheese, crumbled bacon, minced garlic, and chopped onion.
03 -
Add the full-fat mayonnaise to the pan and mix thoroughly until all ingredients are fully coated.
04 -
Bake uncovered for 1 hour and 30 minutes, or until the potatoes are tender and the top is golden and bubbling.
05 -
Allow to rest for 5 to 10 minutes before serving hot.