The ingredient amounts below are enough for Chuck and I to have a large serving each, so just double, triple, or more for a larger crowd. I wouldn't recommend making this in advance, because it will most likely get soggy while waiting in the refrigerator.
Heat olive oil in a medium skillet over medium heat. Add zucchini, season with salt and pepper. Let cook until golden brown on one side, about 3-5 minutes then flip and cook on the other side, 3-5 minutes more.
Add the tomatoes and heat through. Sprinkle with shredded cheese and heat until cheese melts. Season again with salt and pepper if desired. Serve immediately.