INGREDIENTS
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1/4 cup diced pancetta
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1/4 cup extra-virgin olive oil
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1/2 cup thinly sliced onions
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1/4 cup thinly sliced shallots
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3 cloves garlic, whole
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Salt and freshly ground black pepper
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4 cups chicken stock, plus more if needed
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1 cup small pieces country bread
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2 teaspoons fresh tarragon leaves
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2 cups 1-inch-long chopped asparagus
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2 cups spinach, washed
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1 teaspoon lemon juice
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Chives, chopped, for garnish
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Creme fraiche or sour cream, for garnish