how to roast zucchini whole
Preheat oven to 425F. For extra-easy clean-up, cover a baking sheet with foil and top with zucchini, onions and garlic. Drizzle with oil, then use your hands to cover the zucchini and onions with oil. Sprinkle with pepper. If the oven's not fully preheated, go ahead and put the zucchini in anyway. Bake for the remaining time to preheat plus 15 minutes, stir the zucchini and then bake for another 15 minutes.