Method
Step 1
Preparation: Boil the kettle. Prepare all ingredients as indicated above.
Step 2
Lemon: Using the fine side of a box grater, grate the peel to create zest. Cut in half and juice.
Step 3
Baby potatoes: Place a large saucepan on high heat and add boiling water with a pinch of salt. Add the baby potatoes and boil for 15 minutes until tender but not falling apart. If you can easily push a fork in the potato, it’s done. Remove with a slotted spoon and set aside to cool down slightly.
Step 4
Eggs: Boil the kettle. Using the same pot, bring the water to a simmer (gentle boil) and add a little salt. Add the eggs and cook for 6½ minutes for a soft-boiled egg. The white should be set, and the yolk (yellow) should be runny. Peel, cut into quarters and set aside.
Step 5
Dressing: Mix together the mayonnaise, wholegrain mustard, lemon juice (1 tbsp for 4; ½ tbsp for 2; ¼ tbsp for 1), lemon zest, water (2 tbsp for 4; 1 tbsp for 2; ½ tbsp for 1) and dill. Season with black pepper.
Step 6
Salad: Mix a little dressing through the potatoes, then add the rocket, cherry tomatoes and celery.
Step 7
Mackerel: Carefully remove the skin and break the flesh apart with your fingers to remove all the bones.
Step 8
Serve the salad topped with the mackerel and eggs and drizzle with the rest of the dressing.