An idea from Le Menu to use up kohlrabi: Cook some small lentils in boiling water until they're ready to eat (~30 minutes), halfway through add some vegetable bouillon. Combine finely chopped lemon balm and chervil, chopped garlic, light cream, and salt and let simmer gently for a while. Peel some kohlrabi and slice 5-7mm thick. Saute these in butter until cooked through and lightly colored on both sides. Serve by layering the kohlrabi and lentils on a layer of the sauce; top with more herbs for color.