INGREDIENTS
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1/4 cup extra-virgin olive oil
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5 large cloves garlic, very thinly sliced
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1 bulb fennel (with some fronds), halved and thinly sliced
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2 medium carrots, very thinly sliced
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Kosher salt and freshly ground pepper
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1/4 cup dry vermouth or white wine
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1 28-ounce can San Marzano plum tomatoes, crushed lightly by hand
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2 teaspoons roughly chopped fresh tarragon
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2 pounds mussels (preferably cultivated), scrubbed well and beards pulled off
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Crusty bread, for serving