- STEP 1
Cook the potatoes in boiling water until tender , about 15 - 20 minutes.
- STEP 2
Meanwhile , mix together the garlic , the parsley , lemon juice , zest and olive oil to make the dressing.
- STEP 3
Drain the potatoes well , then put them into a salad bowl. Pour over the dressing and stir it through so that the flavours are soaked up by potatoes as they cool down.
- STEP 4
Flake the tuna fish into chunks and add to the potatoes with the spring onions , cucumber and tomatoes. Toss together gently , then serve at once.