Preheat oven to 350°F. Heat a large skillet over medium-high. Add sausage and cook, breaking it up with a wooden spoon, until browned, about 5 minutes. Add onion and bell pepper and cook, stirring occasionally, until tender, 8 to 10 minutes.
Whisk together eggs, milk, hot sauce, salt, and black pepper in a large bowl. Arrange tots in an even layer in a lightly greased 3-quart baking dish. Top with 1 cup cheese and the sausage mixture. Pour egg mixture evenly over tots and top with remaining 1 cup cheese.
Bake until set in the middle, 50 to 55 minutes. Let stand 10 minutes before serving. Top with jalapeño and chives.
Recipe from: Grandjean, Paige. "Potato Tot Breakfast Casserole." Real Simple. November 2017.