For the herbs, use strong flavored, hearty herbs like sage, rosemary, or oregano.
Here are some tips for roasting without oil
- Use a non-stick roasting pan, parchment paper or Silpat (re-usable silicone mat) to ensure that vegetables do not stick to the pan. If using spray oil, use minor amounts to prevent sticking and help the vegetables release properly. One or two short sprays should be sufficient.
- Small amounts of stock can provide moisture while roasting and help prevent sticking.
- Slow roast vegetables and roots in a foil bag, which actually steams the vegetables in their own juices to retain their sweetness.
- When vegetables are roasted with no oil, the finished product is a bit drier than it would be with oil, so you should finish them by adding a lot of flavor post-cooking. Toss the roasted vegetables in a small amount of highly flavored liquid that will boost their flavor and/or add complementary flavor notes to the dish.