Cook buckwheat groats according to directions. I combined ½ C. groats with 1 C. water and brought to a boil, then reduced to simmer, covered for 15 minutes.
Wash and dice sweet potato, skin on. Wash and trim ends off green beans.* Toss with 2 tsp. oil, sprinkle with salt and pepper, and roast on a baking sheet with parchment paper at 400 degrees for 25 minutes.
Shred carrot and brussels sprouts either by hand or using a food processor.**
Prepare dressing by combining all ingredients except thyme together in a food processor - or stir together by hand, and make sure to mince garlic very finely. Stir in thyme.