Line a steamer with baking paper, and add the lemon, carrots, zucchini and asparagus and top with the butter, chives salt and pepper.
Place the steamer over the water and cook covered for 4 minutes or until the vegetables are just tender.
While the vegetables are cooking, place a medium non-stick frying pan over medium heat. Add the haloumi and cook for 1 minute each side or until golden.