"Save room for dessert with this lightened-up version of sweet potato casserole. We've cut the calories, but you'll still love the flavor..."
INGREDIENTS
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3 large sweet potatoes
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2 tablespoons melted butter
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2 tablespoons maple syrup
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1 cup plain greek yogurt
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1 tablespoon pumpkin pie spice
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1 teaspoon salt
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5 egg whites
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2 tablespoons butter
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1/4 cup brown sugar
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1 teaspoon pumpkin pie spice
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1 cup pecans (, chopped)
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1/2 cup oats
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1-1/4 cup marshmallows