First boil the basic 3 ingredients: carrots, potatoes and a parsnip, until soft. Cook them with the skin on. After they are cooked, drain the hot water and add cold water to cool them quicker. Then peel the skin and chop in a small dice.
Hard boil the eggs. Drain cold water and add cold water in the pot with the eggs to cool quicker.
In the meantime prepare a medium mixing bowl or a large Tupperware box. Place all of the cooked and chopped vegetables inside. Add 60 g tinned sweetcorn ( it is important, since the sweetcorn is Low FODMAP at 10 g per serving). Finely dice the gherkins and add to the bowl, too.
Peel the eggs and dice them. You can use an egg chopping tool. Add them to the bowl with mayonnaise and mustard and season to taste. Mix all of the ingredients well.
Decorate it with a parsley leaves.
This salad keeps well in the fridge for a few days.
Enjoy!