Best Green Tomato And Vidalia Onion Gratin Recipes

Creamed Onion Gratin image

Provided by Food Network

Time 1h30m

Yield s: 6 - 8 servings

Number Of Ingredients 8

3 pounds sweet onions (such as Vidalia, Walla Walla, or Maui onions)
3 tablespoons cream sherry
6 tablespoons unsalted butter, divided
1/4 cup all-purpose flour
1 cup whole milk, scalded
1 cup freshly grated Parmesan cheese
Kosher salt and pepper
1/2 cup panko crumbs

Steps:

Preheat the oven to 375 degrees. Lightly grease a gratin dish or medium casserole.
Cut off the root and tip of the onions. Slice in half length-wise and peel. Lay the cut-side of the onion down and slice length-wise into thick wedges.
In a Dutch oven or heavy pot, melt two tablespoons of butter over medium heat. Add the onions and cook, stirring occasionally, until soft and caramelized, about 40 minutes. Add the sherry and simmer until it evaporates. Remove the onions from the pan and pour through a fine mesh sieve. Let them drain while making the bechamel sauce. (Draining the onions prevents a runny gratin because the onions will continue to release more liquid in the oven.)
In the same Dutch oven, melt 3 tablespoons of butter over medium heat. Stir in the flour and cook for one minute. Add the scalded milk and cook, whisking constantly, until the sauce is very thick. Remove from the heat. Fold in the Gruyere and stir until completely melted. Season with salt and pepper, to taste. Add the onions to the cheese sauce and toss to thoroughly coat. Pour the onion mixture into the gratin dish.
Melt the remaining tablespoon of butter and toss with the panko crumbs. Sprinkle over the top of the onions and bake until bubbly and golden brown, about 30 minutes. Serve warm.

Caramelized Vidalia Onion and Potato Gratin with Fresh Sage image

Provided by Bobby Flay

Categories side-dish

Time 2h10m

Yield 4 servings

Number Of Ingredients 7

2 tablespoons olive oil
1 tablespoon unsalted butter
3 Vidalia (or other sweet variety) onion, peeled, halved and thinly sliced on a mandoline
Salt and freshly ground black pepper
3 tablespoons finely chopped fresh sage leaves
6 large Idaho potatoes, peeled and sliced thinly on a mandoline
2 cups heavy cream

Steps:

Preheat oven to 375 degrees F.
Heat oil and butter in a large saute pan over medium-high heat. Add the onions, season with salt and pepper and cook until caramelized, about 15 to 20 minutes. Remove from the heat and stir in the sage. Let cool slightly.
Make a layer of potato slices in a 10 by 10 by 2-inch casserole, season to taste with salt and pepper, spread 1/12 of the onion mixture over the potatoes and coat with 2 tablespoons of the cream. Repeat each step to yield 12 layers. Press down gently on the layers, place the dish on a sheet pan and bake, covered for 25 minutes. Remove cover and bake for another 20 to 25 minutes, or until the potatoes are tender and golden brown on top. Let rest 10 minutes before serving.