Cut squash in half, scrape out seeds, peel squash and cut into 1/2 inch cubes. Spray with olive oil, season with 1/2 tsp black pepper and transfer to a baking sheet lined with parchment paper or Silpat
. Leave some space in one of the corners of baking sheet, spray onion with olive oil and place on baking sheet. Spray unpeeled garlic cloves with olive oil and wrap in aluminum foil. Place in the oven as well.