INGREDIENTS
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1/2 cup (1 stick) unsalted butter
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1 onion, diced
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1/3 cup all-purpose flour
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4 cups milk
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2 cups half-and-half
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4 heads broccoli, cut into florets
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Pinch of nutmeg
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Kosher salt and freshly ground black pepper, to taste
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3 cups shredded mild cheddar cheese
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2 cups vegetable broth