Spray a mini muffin pan with nonstick cooking spray.
Preheat oven to 350℉.
Using something like the handle of a wooden spoon, press the thawed tater tot into the muffin tins, up the sides and in the bottom. It should look like a crust.
Sprinkle cheese over each tater tot.
Bake until the cheese has melted and the tater tots are slightly browned.
Remove from oven.
Top each tot with sour cream, chives, and bacon.
Serve warm.