Cheesy Scalloped Potatoes with Caramelized Onions
Nancy Harrison
Total Time 3hours
Servings: 8
Ingredients
▢3 tablespoons salted butter
▢1 yellow onion, thinly sliced
▢1/4 cup dry white wine, such as
Pinot Grigio
▢1 clove garlic, chopped
▢1 tablespoon chopped fresh thyme
▢2 cups heavy cream
▢1 cup whole milk
▢1 pinch cayenne
▢3/4 cup shredded Gruyere cheese
▢3/4 cup shredded cheddar cheese
▢6 russet or yukon gold potatoes, cut
into 1/8-inch-thick slices
Instructions
1. Preheat the oven to 350° F.
2. Melt together the butter and onions in a
large skillet over medium-high heat. Cook, stirring occasionally until
softened, about 10 minutes. At this point, you'll want to add the wine and
continue to cook another 5 minutes until the onions are deeply caramelized.
3. Add the garlic and thyme, then season with
salt and pepper. Cook another 2 minutes, then remove from the heat.
4. Butter a 9x13 inch casserole dish. In a
large glass measuring cup, combine the cream, milk, a pinch of cayenne, salt,
and pepper. Then add the Gruyere cheese. Pour 1/3 of the milk mix into the
bottom of the baking dish. Layer in 1/3 of the potatoes, and 1/2 of the onions.
Add another 1/3 milk mix, then 1/3 of the potatoes, and then the remaining
onions. Add the remaining potatoes, then pour over the last of the remaining
milk mix. Try to get the potatoes in an even layer.
5. Cover and bake 1 hour 45 minutes to 2
hours. Remove the foil and top with cheddar cheese. Bake another 20 minutes,
until the cheese is golden and melty. Serve the dish warm, topped with fresh
thyme.
Notes:
To make
Ahead: prepare
and bake through step 5, but stop cooking after 2 hours. Let chill, then cover,
and keep in the fridge for up to 4 days. Before baking, bring the dish to room
temperature, add the cheddar cheese, and bake another 20-30 minutes.
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