Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking dish with cooking spray.
- Heat the olive oil in a large skillet over medium heat. Add the chopped onion and cook until softened, about 5 minutes.
- Add the ground beef to the skillet and cook, breaking it up with a spoon, until browned. Drain off any excess grease.
- Stir in the minced garlic, tomato sauce, oregano, basil, salt, and pepper. Bring to a simmer and cook for 5 minutes, stirring occasionally.
- In a large bowl, combine the sliced potatoes, cream of mushroom soup, milk, sour cream, garlic powder, salt, and pepper. Mix well to ensure the potatoes are evenly coated.
- Spread the ground beef mixture evenly over the bottom of the prepared baking dish.
- Carefully arrange the potato mixture over the ground beef layer.
- Sprinkle the shredded cheddar cheese evenly over the top of the potato layer.
- Bake in the preheated oven for 50-60 minutes, or until the potatoes are tender and the cheese is melted and bubbly.
- Let the casserole stand for 10 minutes before serving.
Notes
For best results, slice potatoes thinly and evenly. Experiment with different cheeses like Monterey Jack or Gruyere. The casserole can be assembled ahead of time and refrigerated for up to 24 hours before baking; add 10-15 minutes to the baking time. For a spicier kick, add red pepper flakes to the ground beef. Leftovers can be stored in the refrigerator for up to 3 days and reheated in the oven or microwave.
