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