Swap rice vinegar for apple cider vinegar in a pinch. Use whatever herbs you have; parsley and dill are milder options. Add rice vermicelli, tofu strips, or avocado for a heartier roll, or shrimp/poached chicken if not keeping it vegan. Best enjoyed fresh, but keep wrapped in damp paper towels and plastic in the fridge up to 24 hours; keep dipping sauce separate. Pickled carrots keep up to 5 days.