Tater Tot Breakfast Casserole - Paula Deen

Ingredients

• 1 pound medium to mild breakfast sausage
• 1 cup chopped green onion
• 1 (28-ounce) bag extra-crispy frozen tater tots, thawed and divided
• 2 cups shredded monterey jack cheese with peppers, divided
• 10 large eggs
• 1½ cups whole milk
• 1 tablespoon Dijon mustard
• 1 teaspoon garlic powder
• ½ teaspoon Kosher salt
• ½ teaspoon ground black pepper
• 1 (7-ounce) jar diced pimientos, drained
• chopped green onions, for garnish
• ground black pepper, for garnish