Ensure your avocado is ripe, the flesh giving fairly easily when gently squeezed.
Cut the avocado lengthways, into two halves; remove and discard the stone.
Take one half and cradle it in the palm of your hand.
Draw a small paring knife through the flesh, creating a crisscross pattern; repeat with the other half.
Loosen the flesh by running a spoon between it and the skin; scoop into a small bowl.
Trim, then rough-chop one scallion; add it to the bowl.
Add the lemon juice, cayenne pepper, curry powder and salt.
Gently mash the ingredients together, adding salt and pepper, to taste.
Spoon avocado mix onto two slices of toasted bread; serve right away.
