01 - Preheat the oven to 400°F.
02 - Wash zucchinis and slice them in half lengthwise. Scoop out the centers to create boats, leaving about 1/4-inch shell. Finely chop the reserved zucchini flesh.
03 - Heat olive oil in a large skillet over medium heat. Cook onion until translucent, about 3 minutes. Add garlic and cook for 1 more minute.
04 - Add chopped zucchini flesh and cherry tomatoes to the skillet. Sauté for 3 to 4 minutes until softened.
05 - Stir in cooked chicken, dried Italian herbs, salt, and black pepper. Cook for 2 minutes, then remove from heat and let cool slightly.
06 - Mix half of the mozzarella and all Parmesan cheese into the filling mixture.
07 - Arrange zucchini boats in a baking dish and fill each with the chicken mixture. Sprinkle remaining mozzarella on top.
08 - Bake for 20 to 25 minutes until zucchinis are tender and cheese is melted and golden.
09 - Sprinkle with fresh parsley before serving.