Chop the garlic, spring onion, & chili pepper into small dice
Chop the parsley (but not too small).
Zest the lemon, grind the allspice (if whole) and combine with all the above-mentioned ingredients. Add a pinch of salt.
Heat 150g (5.3 oz) of water but do not bring to boil and add to the garlic & onion sauce you've prepared. Let rest 15 minutes, then add the lime juice and olive oil and the chopped tomato.