Indian Summer Gratin with Butternut Squash, Potatoes, Corn, and Bacon

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This is another one of those recipes that I liked so much I made it twice in a row. It’s a wonderful casserole that can be served for dinner because it’s a complete meal. It’s also nice as a side-dish. The flavors go so well together.

I will warn you that this is time-consuming to put together but I think it’s well worth the effort. It makes a enough to serve 4 as a main dish. It’s wonderful as a leftover if you don’t serve it all in one sitting. I think the flavor actually gets better the next day. It’s a perfect recipe (at least in the Northeast) for this time of year. It’s the tail end of the corn season and the start of the butternut squash season. Potatoes are in season as well. Once the corn season is over, I’ll try it with frozen corn. The recipe is THAT good.


Indian Summer Gratin with Butternut Squash, Potatoes, Corn, and Bacon

Recipe ever so slightly adapted from Fine Cooking Magazine, July 2010

1 Tbs. plus 1/2 tsp. unsalted butter
4 slices bacon
1-1/2 cups Panko breadcrumbs
1/2 cup plus 2 Tbs. finely grated Parmigiano-Reggiano
1 Tbs. extra-virgin olive oil
1-1/2 tsp. chopped fresh thyme leaves
Kosher salt
1 large or 2 medium leeks (white and light-green parts only), halved and sliced 1/4 inch thick
2 tsp. minced fresh garlic
1-3/4 to 2 cups fresh corn kernels (from 3 to 4 large ears)
Freshly ground black pepper
2/3 cup heavy cream
3/4 cup lower-salt chicken broth
1/2 tsp. finely grated lemon zest
12 oz. peeled, seeded butternut squash, cut into 1/2-inch dice (about 2-1/2 cups)
8 oz. Yukon Gold potatoes, cut into 1/3-inch dice (about 1-1/2 cups)

Position a rack in the center of the oven and heat the oven to 400°F. Rub a 2-quart shallow gratin dish with 1/2 tsp. of the butter.

In a 12-inch nonstick skillet over medium heat, cook the bacon until crisp, about 8 minutes. Transfer the bacon to paper towels. Reserve 2 Tbs. of the fat in the skillet; discard the remainder. When the bacon is cool, crumble or mince it.

In a small bowl, combine 1 Tbs. of the crumbled bacon with the breadcrumbs, 2 Tbs. of the Parmigiano, the olive oil, 1/2 tsp. of the thyme, and a large pinch of salt. Mix well.

Add the remaining 1 Tbs. butter to the skillet with the bacon fat and melt over medium heat. Add the leeks and a pinch of salt, and cook, stirring, until softened and just starting to turn golden, 6 to 7 minutes. Add the garlic and stir well. Add the corn, 1/4 tsp. salt, and a few grinds of pepper. Cook, stirring, until the corn has lost its raw look and is slightly shrunken, 2 to 3 minutes. Cool slightly.

Combine the cream and chicken broth in a 2-cup liquid measure. Add the lemon zest, 1/2 tsp. salt, and a few grinds of pepper. Stir to mix well.

In a large bowl, combine the remaining bacon, the corn-leek mixture, the diced squash, potatoes, and remaining 1 tsp. thyme. Toss lightly to combine. Spread the mixture evenly in the gratin dish. Sprinkle the remaining 1/2 cup Parmigiano on top. Stir the cream mixture one more time and pour it over everything as evenly as possible. (Be sure to scrape out any seasonings left in the cup.) Press down on the vegetables with a spatula so that the liquid surrounds them and everything is evenly distributed. Sprinkle the breadcrumb mixture evenly over all.

Cover with foil and bake for 20 minutes. Remove the foil and continue to bake until the crumb topping is deeply golden and the squash and potatoes are tender when pierced with a fork, about 25 minutes. The liquid should have bubbled below the surface of the vegetables, leaving browned bits around the edge of the pan. Let cool for 20 to 25 minutes before serving.

Yield: 4 main-course servings or 6 side-dish servings

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2 comments to Indian Summer Gratin with Butternut Squash, Potatoes, Corn, and Bacon

  • I ripped this one out of Fine Cooking, too! So glad you made it, now I am motivated! I was concerned it would be time-consuming, but the flavors sounded so fantastic, that I was waiting for the right weekend night to try it 🙂

  • StylishCuisine

    @The Food Hound: You should definitely try this. It is a bit time consuming, but definitely worth the effort!

    -Diane

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