INGREDIENTS
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1 pound asparagus, peeled, trimmed and cut into one-inch-long pieces, tips reserved
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5 to 6 cups vegetable stock
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2 tablespoons extra virgin olive oil
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3 tablespoons unsalted butter
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1/3 medium red onion, diced
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1 1/2 cups Arborio rice, or Carnaroli
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1/2 cup dry white wine
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Salt to taste
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1/2 cup grated Parmigiano Reggiano