Begin by draining the chicken, then adding to a bowl and combining with the mayo, onion, sweet peppers, rosemary, and dill weed. Mix this well and let chill in the fridge for 1-2 hours.
Shortly before removing from the fridge, slice the zucchini in half and scoop out the seeds and insides to make the boats, you can also cut these in half again to make 4 pieces.
Heat up the grill to medium-high heat and place them on the grill skin side down for 3-5 minutes to just warm up a bit.
Fill with the chicken salad then garnish with the cheese and parsley.