1Heat oven to 450°F. Arrange frozen potato nuggets in single layer on ungreased large cookie sheet. Bake 24 to 26 minutes until hot and crisp. Line another cookie sheet or pizza pan with cooking parchment paper or foil.
2In medium bowl, mix beans, chiles and salsa. Spread half of the potato nuggets on lined cookie sheet. Spoon half of the bean mixture over potatoes. Sprinkle with half of the cheese. Top with remaining potatoes, bean mixture and cheese. Bake 5 to 10 minutes or until cheese melts.
3Top with tomato and avocado. Serve with sour cream. Top with additional toppings as desired.