For the perfect parsnip texture when roasting, follow these tips: 1. Select firm and fresh parsnips. Avoid those that are overly large or feel soft, as they may have a woody or tough texture. 2. Cut the parsnips into similar size. This ensures even cooking and prevents some from becoming too soft while others remain too hard. 3.Don't overcrowd the pan. Overcrowding can lead to uneven cooking, resulting in some pieces becoming too soft and others too hard. 4. Remove promptly. Start checking them a few minutes before the recommended time to avoid overcooking.