Preheat your bbq grill to a medium-high setting. Toss the sliced zucchini in a few tablespoon of olive oil and cook for 3-5 mins until done and then set aside in a bowl. (Make sure they are not too soft. Also, the cooking time will vary depending on their thickness).
Cook the halloumi for 2-3 mins each side. Slice and add to bowl with zucchini.
To make the mint oil, add the mint leaves and salt to the mortar and proceed to grind with the pestle until you have a paste. Add the oil and combine again.
Add the spinach leaves along with the zucchini and halloumi and toss through one or two tablespoon of the mint oil.