Preheat oven to 400 degrees. Line a half sheet pan with foil then spray with nonstick spray or coat lightly with oil.
Add butternut squash cubes, 1 Tablespoon olive oil, salt, and pepper then toss to evenly coat. Roast for 20-25 minutes, or until squash is tender, stirring halfway through. Set aside to cool. This step can also be done in advance.