Heat oven to 425°F and spray a 9x13-inch casserole dish with nonstick spray. Line a large, rimmed baking sheet with foil and set the casserole dish in the middle of the baking sheet.
Place beef in a large skillet set oven medium heat. Cook until brown throughout, about 6-8 minutes, breaking apart the meat while it cooks. Drain into a colander; set aside.
2 lbs. 90% lean ground beef
Add 1 tablespoon oil and onions to the skillet and set over medium heat. Cook the onions about 5 minutes, stirring often, or until translucent and tender.
1 medium yellow onion, 1 tbsp canola or vegetable oil
Add garlic, chili powder, cumin, coriander, and oregano and cook, while stirring, for an additional 1 minute.
3 garlic cloves, 2 tbsp chili powder, 1 tsp ground cumin, 1 tsp ground coriander, ½ tsp dried oregano
Add browned beef, 1 can (drained) Rotel tomatoes, corn, vinegar, brown sugar, and juice of 1 lime. Season to taste with kosher salt and black pepper; stir well.
1 tbsp cider vinegar, 1 tsp brown sugar, 1 can corn, juice of 1 lime
Stir and cook about 5-10 minutes or until juices reduce and mixture thickens.
In a medium bowl, combine refried beans, 1 can drained Rotel tomatoes, hot sauce, and ¼ cup cilantro; set aside.
16 oz. can refried beans, 2 10-oz. cans original Rotel-style tomatoes, ½ cup minced fresh cilantro leaves, 1 tsp hot sauce
Spread the bean/tomato mixture evenly into the prepared baking dish, and sprinkle 2 cups cheese over the top.
2 cups Colby Jack shredded cheese, 2 cups Mexican-style blend shredded cheese
Spread the beef mixture evenly over the bean mixture and top with the remaining cheese.
Cover the cheese layer with a single layer of tater tots and press down gently.
32 oz. package frozen tater tots
Place the casserole dish (set inside the rimmed baking sheet) on the middle rack of the oven and bake at 425°F for 30-40 minutes or until bubbly and the tater tots are dark golden brown.
Transfer dish to a cooling rack and cool 5-10 minutes before serving.
Garnish with your favorite toppings. Enjoy!
¼ cup chopped fresh cilantro leaves, tomatoes, scallions, cheese, avocados, black olives, sour cream, lettuce