Preheat oven to 350°F.

In a large skillet over medium heat, cook turkey bacon until crispy, about 6–8 minutes. Transfer to a paper towel-lined plate to drain.

Spray a 13×9-inch casserole dish with nonstick cooking spray.

Arrange half of the tater tots in a single layer in the bottom of the dish.

In a large bowl, whisk together eggs, milk, sour cream, salt, and pepper until smooth.

Stir in chopped scallion whites, pimientos, parsley, 1½ cups of the cheese, and cooked turkey bacon.

Pour the egg mixture evenly over the tater tots in the casserole dish.

Arrange the remaining tater tots on top in a single layer, pressing them gently into the egg mixture.

Bake uncovered for 50–60 minutes, or until the center is set and the top is golden brown.

Remove from oven and sprinkle with the remaining ½ cup of cheese.

Return to oven for 5–10 minutes, or until cheese is melted.

Garnish with chopped scallion greens and additional parsley before serving.