Cut the cauliflower into pieces and put it in a blender. Working in batches, pulse the pieces in a blender or food processor until they are broken into tiny pieces.
Cut the tomatoes and the cucumber into little cubes, the olives into slices and finely chisel the mint leaves. Mix them in a bowl with the cauliflower rice.
Add olive oil, lemon juice and salt and pepper, put it in the fridge for 30 minutes and that's it !
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