Season the filling boldly: bread and cheese muffle the spice by about 30% once assembled.
Butter the bread before spreading the chutney to prevent sogginess.
Let assembled sandwiches rest uncovered for 5 minutes before toasting for a crisper result.
The filling keeps in the fridge for up to 24 hours; add fresh coriander just before assembling.
Store toasted sandwiches wrapped in foil for up to 2 hours; re-toast in a dry pan for 1 minute per side to refresh the crust.
No gas hand toaster? A cast iron skillet with a heavy weight pressed on top works well.