Instructions:

1. **Preheat the Oven:**
– Preheat your oven to 375°F (190°C).

2. **Prepare the Potatoes and Onions:**
– In a large bowl, combine the sliced potatoes and onions. Drizzle with olive oil, and add salt, pepper, garlic powder, and thyme. Toss to coat the potatoes and onions evenly.

3. **Assemble the Bake:**
– Grease a baking dish or cake pan. Arrange a layer of the potato mixture at the bottom of the dish.
– Pour half of the heavy cream and milk over the potatoes.
– Sprinkle half of the shredded cheese over the top.

4. **Repeat the Layers:**
– Add another layer of the remaining potatoes and onions.
– Pour the remaining cream and milk over the top, followed by the rest of the cheese.

5. **Bake:**
– Cover the dish with aluminum foil and bake in the preheated oven for 45 minutes.
– Remove the foil and bake for an additional 15-20 minutes, or until the top is golden brown and the potatoes are tender.

6. **Garnish and Serve:**
– Once baked, let the dish cool slightly before slicing.
– Garnish with fresh parsley or dill before serving.

Enjoy this comforting and cheesy potato bake as a side dish or main course!