Lightly Toast 2 slices of sourdough

Place toast on a tray or pan that can go under the grill.

Warm the Thermidor sauce in a pan

Flake the crab in to the sauce and warm through stirring gently so the crab gets nicely covered.

Spoon the crab mixture on to the toast

Place under a hot grill

Remove once bubbling away and starting to colour

Serve