01 - Set oven temperature to 425°F.
02 - Combine sweet potato, butternut squash, and red onion with olive oil, salt, pepper, and thyme. Arrange evenly on a baking sheet.
03 - Roast vegetables for 25 to 30 minutes, stirring once halfway through, until tender and browned.
04 - Rinse farro under cold water. In a saucepan, bring farro, water or vegetable broth, and salt to a boil. Reduce heat and simmer uncovered for 25 to 30 minutes until tender. Drain any remaining liquid.
05 - Whisk together olive oil, apple cider vinegar, maple syrup or honey, Dijon mustard, salt, and pepper until emulsified.
06 - In a large bowl, combine cooked farro, roasted vegetables, baby kale or spinach, dried cranberries, pumpkin seeds, and feta cheese. Drizzle with vinaigrette and toss gently to combine.
07 - Serve warm or at room temperature.