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1
Preheat oven to 400u00b0.
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2
Separate bacon slices and arrange on a large rimmed baking sheet.
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3
Place in the oven as it preheats and bake until the bacon is crisp, 10-12 minutes; drain off the fat.
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4
Using 1 tablespoon butter, coat a shallow 3-quart casserole.
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5
Melt the remaining tablespoon of butter in a nonstick skillet.
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6
Add the onions and mushrooms and saute over medium heat, stirring, for 5-10 minutes, until the onions are tender.
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7
Arrange the potatoes in the bottom of the dish, and sprinkle with salt and pepper.
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8
Top with the cooked bacon slices, then the onions and mushrooms.
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9
In a bowl, beat the eggs with the milk and parsley.
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10
Pour over the casserole and top wih the cheese.
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11
Bake the casserole, uncovered, for 45 minutes, or until set and the cheese is melted.
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12
Serve immediately.