– Preheat your oven to 375°F (190°C).
2. **Cook Ground Beef:**
– In a large skillet, cook the ground beef over medium heat until browned. Drain any excess fat.
– Add the chopped onion and garlic to the skillet. Cook until the onion is translucent and the garlic is fragrant.
3. **Prepare Potatoes:**
– Peel and thinly slice the potatoes. You can use a mandoline slicer for even slices.
4. **Mix Soup and Milk:**
– In a bowl, combine the condensed cream of mushroom soup with the milk. Mix until smooth.
5. **Layer Ingredients:**
– In a greased 9×13-inch baking dish, start by spreading a thin layer of the soup mixture on the bottom.
– Add a layer of potato slices, followed by a layer of the cooked ground beef mixture.
– Sprinkle some salt, pepper, and dried thyme over the beef layer.
– Add a layer of shredded cheddar cheese.
– Repeat the layers until all ingredients are used, finishing with a layer of cheese on top.
6. **Bake:**
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