Dice the kohlrabi, onion, one apple and the potato and gently cook them in a large pan with one spoon of oil until lightly golden. Then add your bouillon and let simmer for half an hour.
Meanwhile slice the other apple thinly with a mandolin and lay it in a baking tray with a drizzle of olive oil and herbs. Bake at low temperature for 15 minutes or until crisp. What you want is apple savory crisps ( you can make more to have a healthy snack later..). Use the same tray to toast the bread with herbs and oil.
When the vegetables are soft, take out of the hobs and mash with what you have (handled mixer, kitchen robot etc) until is creamy and smooth. Then add 2 spoons of goat cheese and mix again.
Serve your creamy soup with the apple crisps and toasted bread.