INGREDIENTS
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Unsalted butter, for dish, plus 1/2 stick (4 tablespoons), cut into 1/2-inch pieces
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3 slices day-old sourdough bread or 2 cups bread crumbs
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3/4 cup heavy cream
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1 teaspoon all-purpose flour
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1/4 cup capers, rinsed and drained
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8 ounces bacon, cooked until crispy and cut into 1/2-inch pieces
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1 cup grated Gruyere, divided
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Kosher salt and freshly ground black pepper
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1 pound cauliflower, trimmed and cut into florets
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Olive oil, for drizzling