Scarlett’s Tuna Salad

Step 1

In a clean glass jar with a tightfitting lid, mix vinegar, sugar and 1 teaspoon kosher salt with 1/2 cup hot water. Shake until sugar is dissolved. Bring a pot of water to the boil, and add the onions. Let it sit for just a few seconds in the hot water, then drain well and transfer onions to the jar with the vinegar. The pickled onions will be ready to use in an hour, or can be made ahead and kept in the fridge for up to a week.

Step 2

In a large mixing bowl, dress the cucumber and spring onions with the remaining kosher salt and lime juice. It should be fairly wet. Pour into a deep serving plate or a wide bowl, along with any extra liquid at the bottom of the bowl.

Step 3

Spoon tuna out of the oil, and use your hands to break it into bite-size pieces, directly into the now-empty mixing bowl. Add avocado, 3 tablespoons of pickled red onion and 1 tablespoon of pickling liquid from the jar, and mix gently with your hands to dress. Scatter over the cucumber mixture, and season with finishing salt and black pepper. Cover with torn herbs, and generously drizzle everything with olive oil. Eat right away, with spoons.