1.Preheat the Oven: Set your oven to 425°F (220°C) and allow it to heat up fully.

2. Cook the Ground Beef Mixture:

• In a large sauté pan over medium-high heat, add the lean ground beef with a dab of margarine or butter.
• Crumble the ground beef as it cooks. Add the diced onions and stir.
• Continue cooking until the onions become translucent and the ground beef is fully browned.

3. Add the Corn and Seasoning:

• Stir the canned corn (with its liquid) into the ground beef mixture.
• Combine water, gravy mix, salt, pepper, onion powder, and garlic powder. Mix well until the ingredients are coated in the gravy.

4. Assemble the Casserole:

• Grease a 9×13 inch baking dish.
• Pour the ground beef mixture into the dish and spread it out evenly. Set aside.

5. Prepare the Mashed Potatoes:

• In a medium saucepan, bring 1 1/2 cups of water and 2 tbsp margarine to a boil.
• Remove from heat and stir in the instant mashed potato mix and milk.
• Let the potatoes sit for 1 minute, then stir until smooth and creamy.

6. Layer the Casserole:

• Evenly layer the mashed potatoes over the ground beef mixture in the baking dish.
• Place the frozen tater tots in a single, even layer over the mashed potatoes.

7. Bake the Casserole:

• Place the baking dish in the preheated oven and bake for 30 minutes, or until the tater tots are golden and crispy.

8. Add the Cheese:

• Remove the casserole from the oven and sprinkle the shredded mozzarella and cheddar cheese blend over the tater tots.
• Return the dish to the oven and bake for another 4-6 minutes, or until the cheese is melted and lightly browned.

9. Serve:

• Let the casserole sit for a few minutes to settle before serving. Enjoy!