Heat oven to 400 degrees F. In a small bowl, whisk together the olive oil, honey, coriander seeds, and caraway seeds. Place carrots and garlic cloves in an even layer in a baking dish. Season generously with salt and pepper. Add the olive oil-honey-spice mixture and toss well to evenly coat.
Roast for 20-30 minutes, or until the carrots and garlic cloves are tender and golden brown (toss a few times to help them cook evenly.) Once done, remove from oven and finely chop the roasted garlic.
In a small bowl, combine the roasted garlic with the mustard greens, parsley, and lemon zest. Use the back of a fork to evenly incorporate the roasted garlic into the greens. Sprinkle the carrots generously on top of the mustard greens gremolata. Season to taste with salt and pepper. Serve warm.