INGREDIENTS
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3 tablespoons unsalted butter, plus 1 tablespoon melted and more for greasing dish
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Kosher salt
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1 cup dry orzo pasta
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6 cups broccoli florets (about 12 ounces)
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2 tablespoons all-purpose flour
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1 small onion, diced (about 1/2 cup)
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2 cloves garlic, minced
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2 1/2 cups whole milk
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1 1/2 cups shredded Havarti
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1/4 cup sour cream
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3 tablespoons grated Parmesan
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Freshly ground black pepper
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1/2 cup panko bread crumbs