INGREDIENTS
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8 potatoes, peeled and diced
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1 (10.5 oz.) condensed cream of chicken soup
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3/4 cup yellow onion, finely chopped
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1/2 cup (1 stick) unsalted butter, melted
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1 (16 oz.) container sour cream
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2 teaspoons mustard
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1 teaspoon garlic powder
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1/2 teaspoon cajun seasoning
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2 1/2 cups sharp cheddar cheese, grated, divided
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Kosher salt and freshly ground pepper, to taste
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Green onions, chopped, garnish, optional