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Author Notes: What do you get when you mash together roasted butternut squash and Idaho potatoes? You get the perfect holiday side dish, in my opinion. The fact that it is all held together with Gruyere cheese, bacon and beaten egg only gilds the lily. To top it off, it is a casserole that can be assembled ahead of time; something that we all appreciate this time of year. —lakelurelady
- 4 cups peeled, seeded and cubed butternut squash
- 2 tablespoons olive oil
- Salt and Pepper to taste
- 4 Large Idaho potatoes, peeled and cubed
- 6 Slices Bacon, cubed
- 3 tablespoons unsalted butter, at room temperature
- 3 Large eggs
- 1 1/4 cups Gruyere cheese, shredded
- 1/2 teaspoon Fresh nutmeg, grated
- 1 cup Fresh bread crumbs
- Preheat the oven to 400 degrees F. Place the cubed butternut squash on a large sheet pan. Drizzle it with olive oil and salt and pepper. Toss to coat. Place it in the oven and cook, turning once until it is tender and just beginning to brown; around 20 to 25 minutes.
- Place the cubed potatoes in a saucepan and cover with water. Salt. Bring to a boil and cook for about 20 to 25 minutes until fork tender.
- While the squash is roasting and potatoes are boiling, fry the bacon pieces until crisp. Drain on paper towels. Reserve 2 tablespoons of dripping for 2 quart shallow casserole dish. Brush the drippings on bottom and sides of dish. Set aside.
- When squash and potatoes are tender, drain the potatoes well and scoop the squash and potatoes into a large bowl. Add 2 tablespoons of the butter and mash well with a potato masher until all are combined. Add 1 cup of the Gruyere cheese, salt and pepper to taste and the grated nutmeg. Add the beaten eggs after it has cooled a bit. Mix well and transfer mixture to prepared casserole.
- Mix the reserved 1 tablespoon of softened butter with the bread crumbs. Sprinkle over casserole. Scatter the bacon bits over the top and then finish with the extra 1/4 cup Gruyere cheese.
- Place casserole in the 400 degree F. oven and bake the gratin until the top has a light golden crust, about 30 minutes. (If doing ahead, the casserole can be held in the refrigerator before baking. Just bring to room temperature for about 30 minutes before baking.)
- This recipe was entered in the contest for Your Best Recipe with Potatoes