Toss cauliflower florets with olive oil, 1/2 tsp salt and a grind of pepper. Roast at 220C for 15-20 minutes, turning half way, until golden brown but still holding their shape. Reserve to one side.
Reduce oven temperature to 180°C. Place almonds in a single layer on a tray in the oven and roast until golden, about 8-10 minutes, checking regularly. Remove, allow to cool and roughly chop.
Make dressing with the lemon juice and olive oil and season to taste.
Spread labna across the base of four plates.
In a bowl, toss the warm cauliflower with the roasted almonds, all remaining ingredients and the dressing. Divide mixture evenly across four plates and serve immediately.