INGREDIENTS
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3 large parsnips, peeled and cut into noodles with a spiralizer
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2 medium sweet potatoes, peeled and cut into noodles with a spiralizer
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1 small butternut squash, peeled and cut into noodles with a spiralizer
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2 tablespoons extra-virgin olive oil
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Kosher salt and freshly ground black pepper
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2 tablespoons unsalted butter
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1 sweet onion, diced
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2 garlic cloves, minced
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1/4 cup all-purpose flour
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1 cup whole milk
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1/4 cup grated Parmesan cheese
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1 1/4 cup grated Gruyère cheese, divided
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2 teaspoons chopped fresh thyme
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2 teaspoons chopped fresh rosemary
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1 tablespoon chopped parsley