Brown the hash browns

• Heat a dash of olive oil in a medium saucepan.
• Add the diced hash browns and brown them lightly.

Cook the beef and onion

• Add the ground beef to the same pan and cook it through.
• Add the diced onion and cook until almost done.

Season the mixture

• Stir the taco seasoning into the meat mixture and let it combine well.
• Take the pan off the heat and stir in the diced tomatoes with green chilies.

Combine with cheese

• Transfer the meat mixture into the pan with the hash browns.
• Add the shredded cheddar cheese and stir everything together until well mixed.

Assemble the casserole

• Pour the mixture into a casserole dish and spread it evenly.
• Scatter the remaining cheese over the top.

Bake

• Bake at 200 °C until golden brown on top.

Serve

• Plate the portions and crush spicy nacho Doritos over each serving just before eating, so they stay crunchy.