Remove the stems from the Swiss chard leaves and cut the leaves into smaller pieces for rolling.
Prepare vegetables
Slice the onions through the root end, then place them in a pot of boiling water for 3–4 minutes. Remove and carefully separate the layers one by one. If the inner layers are still firm, return the onions to the boiling water until they soften enough to separate.
Hollow out the bell peppers and baby courgettes, and stuff them along with the dried eggplants.