Can I prepare the cabbage filling ahead of time?
Yes. Mix the Parmesan, chives, red pepper flakes, and shallot up to 1 day ahead and refrigerate. Stuff and braise just before serving.
How do I know when the cabbage is done braising?
The cabbage should be fork-tender but still hold its wedge shape. Braise for 20–30 minutes, checking for doneness after 20 minutes.
Can I use red cabbage instead of green?
Yes, but red cabbage takes slightly longer to braise—add 5–10 extra minutes and the color will deepen. Taste will be slightly earthier.
What can I substitute for walnuts?
Toasted almonds, pecans, or sunflower seeds work well. Toast them separately and sprinkle on just before serving to maintain crunch.
How do I store leftovers?
Refrigerate in an airtight container for up to 3 days. Reheat gently in a 325°F oven for 10–15 minutes, adding walnuts fresh after warming.