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Export 7 ingredients for grocery delivery
Step 1
In a medium bowl, stir together the red onion, lemon zest, lemon juice and a pinch of salt. Let sit about 5 minutes to mellow the onion’s sting.
Step 2
Add the sardines and their oil, along with the mustard. Use a fork to mash the sardines and vigorously stir until the mixture is creamy. Add the celery, a few grinds of pepper and capers and/or herbs, if using. Stir to combine. Taste and adjust seasonings with salt, pepper and lemon juice. (Sardine salad will keep, refrigerated, for 3 days.)