Mix the dressing ingredients in a small mixing bowl and refrigerate until ready to use.
Bring a large pot of salted water to a boil over medium-high heat. Carefully add the potatoes and eggs and let boil for 8-10 minutes.
Remove the eggs from the water and continue the potatoes boiling for an additional 5-10 minutes, or until fork-tender.
While the potatoes are boiling, run the eggs under cold running water to stop cooking, remove the shell, and set aside.
Meanwhile, prepare the remaining ingredients. Slice the cucumber halfway lengthwise. Using a spoon, scoop out the seeds avoiding the flesh, and chop. Slice the radish and finely chop the green onions.
Chop the eggs into bite-size pieces. Once the potatoes are done, remove them from the heat and allow them to cool for about 10-15 minutes.
Chop them into 1/4-inch thick rounds and place them into a large bowl. Add cucumber, radish, green onions, eggs, and a generous pinch of salt to the potatoes.
Pour the dressing all over the veggies. Mix well to evenly coat. Cover the bowl with cling film, and refrigerate to enhance the flavors for at least 15 minutes.
Sprinkle some more black pepper and enjoy.
Notes
Do not overcook the potatoes to a point where they will be too much.
You will need hard-boiled eggs for this recipe.
Allow the potatoes to cool first before dicing. You can place them in a cold water bath.
Best served cold.
Store in a sealed container in the fridge for up to 5 days.