individually and tightly in foil, sealing it so none of the butter and juices can escape. That sealed packet is the whole trick — it’s what steams the onion soft while the broth collects inside instead of running out onto the tray. Set the packets on the baking dish.
Step 5 — Bake
Bake for 60 minutes, until the onions are completely tender — a knife should slide in with no resistance. Larger onions may want an extra 10–15 minutes, so test rather than watch the clock. Open the foil carefully; there’s a
