INGREDIENTS
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1 (2-pound) butternut squash, halved lengthwise and seeded
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Cooking spray
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1 teaspoon butter
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4 cups finely chopped leek (about 6 large)
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1 tablespoon sugar
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3/4 teaspoon salt
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1/4 teaspoon freshly ground black pepper
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Dash of ground nutmeg
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4 large eggs
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1 large egg yolk
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1/4 cup (1 ounce) grated fresh Parmesan cheese