Drain the chickpeas well.
Preheat the oven to 375'. Place olive oil, cilantro stems, garlic, spices, honey, salt, pepper and lemon zest in a large bowl and mix well. Cut the beets and potatoes in half so they are about the same thickness as the carrots and parsnips. Add the chickpeas, carrots, parsnips and potatoes to the bowl and toss to coat. Transfer to a baking sheet in a single layer. Toss the beets in the remaining marinade and tuck them to one side of the baking sheet (beets stain and will turn everything pink so this is for aesthetics, if you don't mind all pink vegetables, by all means toss everything at once). Roast for 35-45 minutes, stirring everything once, until golden and tender.
Meanwhile, cook your grains and keep them warm.
To make the chermoula, put all the ingredients in a blender or food processor and blend until a rough sauce is formed. Season to taste with salt.
Serve the grains topped with the roasted vegetables and chickpeas, scraping up all the spices left on the tray. Drizzle with chermoula and sprinkle with mint leaves.
