Steam potatoes and carrots until the middle is soft. Peel off the skins and cut into medium size cubes. Place in a big bowl.
Cut leeks in half, lengthwise, and cut again into 3 long strips lengthwise. Chop into small cubes. Place in a strainer and wash. Let the water drain very well before placing it in the bowl with carrots and potatoes.
Next cut the pickles into cubes and add to the bowl following with corn, mayonnaise and mustard. Give everything a good mix. Add boiled eggs cut into cubes, salt and pepper to taste and give it a gentle mix with a spatula or big wooden spoon.
Cover tightly and place in the fridge for a few hours before serving. All the flavours will mix and combine during that time. Before serving give it another try to see if it needs more salt or pepper.
Keyword Christmas, Easter, Polish, Salad, Traditional