Tasting as I went along, I added the freshly squeezed juice of about three limes. After adding a few generous pinches of sea salt, I snipped in about four spring onions (scallions, to my American friends) and a handful of chopped fresh coriander (cilantro).
Finally I mashed this roughly with a lovely new Joseph Joseph masher I got from my mum for Christmas. The quantity here provided enough for about 16 fajitas! Cool photo taken by my son.