01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper or foil.
02 - Spread the frozen tater tots in a single layer on the prepared baking sheet. Bake for 20–25 minutes, turning halfway through, until golden and crispy.
03 - While the tater tots are baking, place the diced beef bacon in a skillet over medium heat. Cook for 5–7 minutes, stirring occasionally, until crispy. Drain on paper towels.
04 - Once the tots are crispy, remove the baking sheet from the oven. Sprinkle the cheddar and mozzarella cheeses evenly over the hot tater tots. Return to the oven for 3–5 minutes, until the cheese is melted and bubbly.
05 - Remove from the oven and immediately top with the crispy beef bacon bits and sliced spring onions.
06 - Transfer to a serving platter. Add dollops of sour cream and garnish with black pepper and optional fresh herbs. Serve immediately.