"Easy, cheesy, and oh so good. Thank you, Grandma Grace!..."
INGREDIENTS
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5 pounds russet potatoes (about 6 large)
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1 tablespoon plus 1 1/2 teaspoons kosher salt, divided, plus more as needed
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8 tablespoons (1 stick) unsalted butter, plus more for the baking dish
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1/2 cup all-purpose flour
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4 cups (1 quart) whole milk
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1 cup heavy cream
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1 pound pre-shredded sharp cheddar cheese (about 4 cups), divided
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26 Ritz crackers (3 ounces)
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1/2 ounce Parmesan cheese (1/3 cup firmly packed freshly grated or 2 tablespoons store-bought grated)