Ottolenghi Simple's sheet pan approach is not merely a convenience technique — it documents the specific conditions required for oven-roasting to produce the Maillard browning and caramelisation that makes roasted vegetables worth eating rather than merely cooked. The principle: maximum surface area in contact with a hot pan, minimum crowding, maximum oven temperature.
Roasting vegetables on a sheet pan at high temperature (220–230°C) with enough space between pieces for hot air circulation, producing caramelisation and browning rather than steaming.
- Never crowd the pan — crowded vegetables steam in each other's moisture rather than roasting. A single layer with space between pieces is non-negotiable. If the quantity of vegetables requires more space, use two pans [VERIFY minimum spacing] - Preheat the pan in the oven — placing vegetables on a cold pan produces steam before the Maillard reaction can establish. A hot pan immediately begins the browning on the underside surface [VERIFY whether Ottolenghi specifically recommends this] - Cut uniformly — uniform size means uniform cooking. Irregular cuts produce some burnt pieces and some under-cooked pieces - Coat evenly in oil before roasting — uncoated surfaces char; over-oiled surfaces don't brown (the excess oil steams rather than conducts heat directly) - Minimum temperature 200°C; 220–230°C preferred — below 200°C the vegetables stew in their own moisture before the surface dries enough to brown [VERIFY] Decisive moment: The flip at the halfway point — the bottom surface should be golden and caramelised, not pale. If pale at the halfway point, the oven temperature needs to increase or the pan needs to move to a lower shelf closer to the heat source.
FLAVOUR THESAURUS (continued) + OTTOLENGHI SIMPLE