The next day, preheat oven to 400 F. Wash butternut squash well before cutting in half lengthwise. Scoop out seeds and reserve (see tip). Season squash with pinch of salt and use 1 Tbsp olive oil to coat on all sides. Line baking sheet with parchment, place squash halves cut side down, and prick exterior a few times with fork. Place carrots, poblano, and bell peppers on baking sheet and drizzle with remaining 1 Tbsp olive oil.