01 -
Preheat the oven to 220°C.
02 -
Place the ground beef and a small amount of margarine or butter in a large sauté pan over medium-high heat. Break up the beef while cooking.
03 -
Add diced onions to the pan with the ground beef. Stir and cook until onions are translucent and beef is fully browned.
04 -
Add canned corn with its liquid, water, beef gravy mix, salt, pepper, onion powder, and garlic powder to the pan. Stir until the mixture is evenly coated and combined.
05 -
Spread the beef mixture evenly in a greased 23 x 33 cm baking dish. Set aside.
06 -
Bring water and margarine to a boil in a medium saucepan. Remove from heat and add instant mashed potato mix and milk. Stir briefly until combined, let stand for 1 minute, then stir until smooth and creamy.
07 -
Evenly spread the mashed potatoes over the beef mixture in the baking dish.
08 -
Place frozen tater tots in a single layer on top of the mashed potatoes.
09 -
Bake the casserole in the oven for 30 minutes.
10 -
Remove the dish from the oven and sprinkle the shredded cheese blend evenly over the tater tots.
11 -
Return the dish to the oven and bake for a further 4–6 minutes, or until the cheese is melted and lightly browned.
12 -
Allow the casserole to rest for several minutes before portioning and serving.