In a large bowl, combine zucchini, olive oil, garlic powder, salt and pepper and toss to combine.
Preheat your grill or grill pan to medium and grease with olive oil.
Once your grill is hot, cook the zucchini 4-5 minutes on one side until you have marks from the grill, then flip and cook 3-4 more minutes until tender.
Transfer to a serving dish and garnish with parsley.
*Add some red pepper flakes to the seasoning if you want a little kick to it.