"This is a soup that really benefits from homemade stock...."
INGREDIENTS
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Pasta dough
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1 pound asparagus, trimmed
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5 cups rich chicken stock
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1 (3-inch) rind from a wedge of Parmigiano-Reggiano
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1 Turkish or 1/2 California bay leaf
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1/4 cup grated Parmigiano-Reggiano
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1/4 cup mascarpone
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1/4 cup fine dry bread crumbs
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1 teaspoon grated lemon zest