Heat oven to 450°F. Prepare a lined baking sheet or roast pan with parchment paper or a silicone mat.
Bring water to a boil and cook buckwheat for 15-20 minutes until all water is absorbed and buckwheat has softened.
Mince the garlic, cut the onions into rings, peppers into strips, zucchini into ¼ inch thick rounds, and drain the chickpeas. Scatter on the baking sheet and sprinkle with black pepper.
Bake, stirring once, about 20 minutes until vegetables are lightly browned and tender.
Place buckwheat in a bowl and toss in the roasted vegetables, parsley, and red wine vinegar. Enjoy!