Heat a tablespoon of olive oil in a small pan over a low/medium heat. Mince the garlic and add to the pan, sweating gently until tender.
Add the cauliflower rice, lemon zest and oregano to the pan with the garlic. Stir well to combine. Cook gently for 2-3 minutes until the cauliflower is tender, then set aside.
Heat a griddle pan to high. Slice the halloumi in half lengthwise and arrange on the hot griddle. Cook for 2-3 minutes each side or until golden and the cheese is starting to soften.
Whilst the cheese is cooking, add the pine nuts to a dry pan over a low heat. Toast gently for 2-3 minutes until lightly golden.
To assemble the salad, roughly chop the lettuce and add to a salad bowl alongside the cauliflower rice.
Finely dice the tomatoes and cucumber and scatter over the salad, season all with a little salt and black pepper.
Add the cheese and scatter over the pine nuts.
Drizzle with the remaining olive oil and lemon juice and scatter with chopped fresh mint to serve.