Preheat oven to 425 degrees F. Coat 12 (2 1/2-inch) muffin tins with nonstick cooking spray. Place 4 potato nuggets in each muffin tin. Bake for 12 minutes. Remove from oven. Use the bottom of a 1/4-cup measure to press the potatoes into the bottom and part way up the sides. Return to the oven and bake 12 minutes more.