If you can't find kohlrabi at your local grocery store or farmer's market, you can substitute any combination of turnips, radishes, rutabaga and butternut squash. I used half rutabaga and half butternut squash and it came out delicious! A pinch of black pepper won't add a significant amount of oxalates, but if you are being careful, sub with white pepper.
Head on over to Alysha's blog to see the full recipe, and be sure to make the low oxalate substitutions listed below!
LOW OXALATE SUBSTITUTIONS:
- white pepper for black pepper