Place a large skillet in the oven and preheat the oven to 325°F.
Cut about 1/4 inch from the stem end of the zucchini and then slice lengthwise.
Spray the hot pan with oil and place the six halves in the pan cut side down.
Roast for about 20 minutes.
Turn the zucchini so that they are skin side down.
Sprinkle with black pepper and then the grated parmesan cheese.
Cook for another 2 minutes and serve.
