Wash the zucchinis and slice them in half lengthwise. Using a spoon, scoop out the center to create a small cavity for the filling. Save the scooped-out zucchini flesh for another use, like a stir-fry or smoothie.
Place the hollowed zucchinis on a baking dish, cut side up. Drizzle with olive oil and season with salt, pepper, and garlic powder.
In a mixing bowl, combine the halved cherry tomatoes, mozzarella balls, and chopped basil. Toss gently to mix.
Spoon the tomato and mozzarella mixture into each zucchini boat, filling them generously.
Bake in the preheated oven for 20-25 minutes, or until the zucchinis are tender and the cheese is melted and bubbly.
Remove the zucchinis from the oven and drizzle with balsamic glaze for an added burst of flavor.
Let cool for a few minutes before serving. Enjoy warm!