On a griddle or in a skillet over medium heat, cook the bacon until crispy, about 12 minutes. Set aside.
Carefully add the hash browns to the bacon fat and cook until tender and beginning to crisp, 5 to 7 minutes. Season lightly with salt and pepper.
While the hash browns are cooking chop the bacon into small pieces. Stir it into the cooked hash browns.
Sprinkle the cheese over the top and cover the griddle or skillet to let it melt, 1 to 2 minutes.
Top with scallions and sour cream and serve immediately.
Notes
Drain some fat--If you've got an excessive amount of bacon fat in your skillet or griddle, remove some before adding the hash browns. You only need 1 to 2 tablespoons of fat.
Covering your skillet--The cheese will melt easiest if it's covered. If using an outdoor griddle, cover it with the lid while the cheese is melting; if using a skillet, place a piece of foil over the skillet for the final few moments of cooking.
Spice it up--Like your food spicy? Try adding a drizzle of hot sauce!
Dietary--This recipe is suitable for gluten-free diets.