Preheat oven to 400 degrees.
Fit a large, rimmed sheet pan with parchment.
Peel and trim the carrots.
Toss the carrots with 2 tablespoons olive oil, and season with 1 teaspoon salt and pepper.
Roast the carrots for 20-30 minutes, or until fork tender. Reserve.
Place the carrot greens, remaining salt and pepper, basil, parsley, parmesan, pepitas, onion, and lemon juice in a mini-food processor or blender.
Process until roughly chopped.
Add in olive oil, and process until smooth.
Spoon pesto over roasted carrots.
Serve carrots warm or at room temperature.