Ingredients
Method
- Preheat oven to 375°F (190°C). Grease a 9x13 inch baking dish with 1 tbsp of butter.
- Melt 2 tbsp of butter in a saucepan over medium heat. Cook onion until softened, about 5-7 minutes. Add garlic and cook for 1 minute.
- Stir in flour and cook for 1 minute, stirring constantly.
- Gradually whisk in milk and broth until smooth. Simmer until the sauce thickens, about 3-5 minutes.
- Remove from heat and stir in salt, pepper, and nutmeg.
- Layer half of the potatoes, then half of the sauce in the baking dish. Repeat with remaining potatoes and sauce.
- Dot with remaining butter. Sprinkle with cheese (if using).
- Cover with foil and bake for 30 minutes.
- Remove foil and bake for 20-30 minutes, or until potatoes are tender and top is golden brown.
- Let rest for 10-15 minutes before serving. Garnish with parsley, if desired.
Notes
For a richer flavor, use heavy cream instead of milk. Adjust seasonings to your preference.
