INGREDIENTS
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1 head of cauliflower (any color—I used orange), chopped into tiny florets
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1 tablespoon olive oil
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1 teaspoon kosher salt, plus more for the pasta
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1 teaspoon black pepper
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8 ounces elbow pasta
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8 ounces Gruyère, shredded
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2 1/2 cups heavy cream
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1 clove garlic, finely minced (optional)
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1 teaspoon ground mustard
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1/4 teaspoon ground nutmeg
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Pinch of cayenne (optional)
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3 ounces Parmigiano-Reggiano, finely grated