Yes, you can roast the broccoli in the oven. - First, in a bowl, mix broccoli with all the ingredients (except the onions). - Then, spread out the broccoli on a baking sheet. Keep the oily mixture remaining at the bottom of the bowl. - Put baking sheet in a 325°F pre-heated oven (162°C) and cook for 3 minutes. - While the broccoli is roasting, put the onions in the same bowl that you mixed broccoli. Let the onions soak up the oily mixture in the bowl. - Pull out the broccoli sheet pan, put the onions next to broccoli and place the tray back into the oven. - Cook for 2 minutes, remove and let it cool to touch before serving.