Preheat the oven to 400°F. Line a baking sheet with parchment paper.
In a bowl, toss the beet wedges and carrot rounds with olive oil, salt, and black pepper until evenly coated. Spread them out in a single layer on the prepared baking sheet.
Roast the vegetables in the preheated oven for 25-30 minutes, or until tender and slightly caramelized, stirring halfway through for even cooking. Remove from the oven and let cool slightly.
In a large bowl, combine the mixed salad greens, roasted beets, and carrots. Drizzle with balsamic vinegar and honey, tossing gently to combine.
To serve, divide the salad among plates, placing a piece of burrata cheese on top of each serving. Sprinkle with toasted walnuts for added crunch.