Preheat the oven to 425°F. Lightly spray a 9x13 baking dish with nonstick cooking spray and set aside.
Add the ground beef and onion to a large skillet over medium heat and cook, stirring occasionally, about 5 to 6 minutes until beef is no longer pink and onion is translucent. Drain off any excess grease.
1 pound lean ground beef, ½ cup yellow onion
Add two teaspoons of taco seasoning and 3 tablespoons of water and stir to combine. Cook until liquid has evaporated, stirring frequently.
4 teaspoons taco seasoning
Stir in the salsa, rinsed and drained beans, drained corn and another teaspoon of taco seasoning.
1 cup chunky salsa, 15 ounces black beans, 15 ounces fire roasted corn, 4 teaspoons taco seasoning
Transfer the beef mixture to the prepared baking dish and spread into an even layer.
Sprinkle 2 ½ cups of the Mexican cheese blend over the top of the beef mixture.
4 cups Mexican cheese blend
Place the frozen tater tots on top of the cheese in a single, even layer.
32 ounces frozen tater tots
Sprinkle the remaining teaspoon of taco seasoning evenly over the tater tots.
4 teaspoons taco seasoning
Bake for 40 to 45 minutes or until golden brown and crispy on top and bubbling in the middle.
Top with the remaining cheese and broil for 1 to 3 minutes until the cheese is melted and bubbly.
4 cups Mexican cheese blend
Serve hot topped with your choice of toppings.
Chopped black olives, Chopped green onions, Chopped lettuce, Chopped tomatoes, Sour Cream, Guacamole, Pico de Gallo