Step 2: Preheat the Oven
Preheat your oven to 375°F (190°C). Lightly butter a baking dish to prevent sticking and to add flavor.
Step 3: Make the Cream Sauce
In a medium saucepan, melt the butter over medium heat. Add the chopped onion and sauté until soft and translucent, about 3–4 minutes. Sprinkle in the flour and stir constantly for 1–2 minutes to form a smooth roux.
Slowly whisk in the milk and cream, stirring continuously to avoid lumps. Cook until the sauce thickens and becomes smooth and creamy. Season with salt, pepper, and nutmeg. If using cheese, stir it in at this stage until melted and fully incorporated.
Step 4: Assemble the Dish
Arrange half of the potato slices in an even layer in the prepared baking dish. Pour half of the cream sauce over the potatoes, spreading it gently to coat. Repeat with the remaining potatoes and sauce, making sure the top is evenly covered.
Step 5: Add the Topping
Sprinkle the top with grated Parmesan or buttered breadcrumbs. This creates a lightly crisp, golden crust that contrasts beautifully with the creamy interior.
Step 6: Bake to Perfection
Cover the dish loosely with foil and bake for 35–40 minutes. Remove the foil and continue baking for another 20–25 minutes, or until the top is golden and the potatoes are fork-tender. If needed, broil for 2–3 minutes at the end for extra browning.
Step 7: Rest and Serve
Remove the Potatoes Delmonico from the oven and let it rest for 10 minutes before serving. This allows the sauce to set slightly, making it easier to serve neat portions.
Serving Tips and Variations
- Add protein: Finely diced ham or cooked bacon can be layered with the potatoes for a heartier dish.
- Herb boost: Fresh thyme or parsley adds a subtle freshness.
- No-cheese version: For a more traditional, ultra-creamy style, skip the cheese and rely on the rich sauce alone.
Final Thoughts
Potatoes Delmonico is a celebration of classic comfort and culinary history. Creamy, satisfying, and beautifully baked, it proves that with the right technique, simple ingredients can become truly extraordinary. Whether served at a festive gathering or a cozy family dinner, this dish is sure to impress and comfort in equal measure. 🥔✨
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