INGREDIENTS
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3 pounds (about 3 large) russet potatoes, peeled and chopped into 1-inch chunks
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4 tablespoons butter
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1/2 cup 1/2 cup grated parmesan
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1/2 cup (4 ounces) mascarpone cheese
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1 cup shredded sharp cheddar cheese
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1/2 teaspoon freshly ground black pepper
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1 teaspoon kosher salt
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1 cup chicken broth
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1 1/2 cups milk, divided
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4 cloves garlic peeled and minced
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1 1/2 pounds cauliflower florets (from 1 large head cut into 6 or 8 large chunks)
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10 large sage leaves