INGREDIENTS
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2 bunches asparagus (about 2-1/4 pounds)
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3 tablespoons unsalted butter
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2 medium yellow onions, chopped
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3 cloves garlic, peeled and smashed
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6 cups low sodium chicken broth
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Salt
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Freshly ground black pepper
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2 tablespoons freshly squeezed lemon juice, from one lemon
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1/4 cup grated Parmigiano-Reggiano
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Handful fresh herbs, such as thyme, dill or basil (optional, for garnish)