Place a rack in the center of your oven and preheat to 375 degrees f.
Halve each zucchini lengthwise and make several thin cuts on diagonally as shown in the video, making sure you don't go all the way through. This will help them cook faster.
Sprinkle zucchini lightly with salt and set aside for 5-10 minutes. Once zucchini has "sweat" out some moisture, blot with a paper towel. This step helps prevent watery/mushy zucchini.
Arrange your prepared zucchini halves, cut side up, on a parchment paper lined sheet pan.
In a small bowl, combine the oil and garlic. Brush or spritz the zucchini with the oil mixture, then sprinkle with sea salt and pepper.
Bake for 10 minutes.
Meanwhile, slice your mozzarella into 2-inch pieces and slice the tomatoes.
Once the zucchini is finished baking, remove from the oven and top with a slice of mozzarella followed by a tomato slice. Repeat this pattern until all the zucchinis are covered, as shown in the photos.
Bake for 5 more minutes, or just until the cheese is nice and melty. Don't over bake!
Quickly chop the basil and sprinkle your caprese zucchini with it.
Serve while hot.