01 -
Preheat the oven to 325°F (163°C) and lightly grease a 9×13-inch baking pan.
02 -
In the baking pan, combine the diced potatoes, shredded cheddar cheese, crumbled bacon, minced garlic, and chopped onion.
03 -
Add the full-fat mayonnaise and mix thoroughly until all ingredients are evenly coated.
04 -
Bake uncovered for 1.5 hours, or until potatoes are fork-tender and the top is golden and bubbly.
05 -
Let the dish rest for 5-10 minutes before serving hot.