INGREDIENTS
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2 4-ounce cans smoked whole sardines
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12 ounces linguine or other dried pasta
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4 tablespoons olive oil, divided
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1 small shallot, finely chopped
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4 garlic cloves, finely chopped
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3/4 teaspoon crushed red pepper flakes
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4 radishes, trimmed, quartered
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2 cups baby kale or spinach leaves
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2 tablespoons (or more) fresh lemon juice
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Kosher salt, freshly ground pepper
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Lemon zest (for serving)