Preheat your oven to 425°F.
Toss the carrot rounds with 2 tbsp olive oil, ½ tsp salt, and ¼ tsp black pepper in a large bowl.
Spread the carrots in a single layer on a baking sheet lined with parchment paper.
Roast the carrots for 20–25 minutes, flipping them halfway through, until tender and lightly caramelized at the edges.
While the carrots roast, whisk together 3 tbsp olive oil, 2 tbsp lime juice, 1 tsp honey, and ¼ tsp salt in a small bowl until emulsified.
Place the mixed greens in a large serving bowl.
Arrange the roasted carrots and sliced avocado over the greens.
Drizzle the dressing evenly over the salad.
Sprinkle the toasted pepitas on top.
Gently toss the salad to combine all ingredients.