Preheat oven to 220º C
Marinate Feta in olive oil, lemon juice and salt and pepper.
Transfer feta to oven proof baking tray and bake for 20 mins or until crisp and golden. Once ready set aside to cool.
Peel and slice Kohlrabi very thin. If using mandolin, please be careful with your fingers.
Peel and segment Grapefruit. (watch video for how to )
Mix olive oil, elderflower vinegar, salt and pepper in a jar and shake. Pour over kohlrabi and set aside.
Arrange kohlrabi on to a plate, add grapefruit segments, baked feta and sprigs of mint.
Grind some more fresh black pepper. ( optional, but highly recommended)