Choose the substitute based on your recipe: turnip or celery root for cooked dishes; jicama or turnip-jicama blend for raw dishes.
Peel and dice or slice the substitute vegetable to match preparation for kohlrabi.
Use the recommended 1:1 ratio (or half and half for mix) adjusting quantity as needed for texture and flavor.
For cooked dishes, warm or roast substitutes until tender; for raw, serve immediately or chill with dressing.
Taste and adjust seasoning or texture to match your desired dish characteristics.