Preheat oven to 350° spread cashews out, in a single layer, on a sheet tray. Roast in oven for 5 minutes, toss, continue roasting for 2 more minutes. Set aside
In the bowl of a food processor pulse cashews and garlic until they resemble sand. Add carrot tops, parsley, cheese, salt and pepper. Pulse until smooth and well combined. Drizzle in olive oil and continue pulsing until well combined. If pesto becomes stiff and collects together like a large ball add more olive oil or a splash of vegetable stock.
Preheat oven to 350.
Toss carrots with olive oil and spices. Spread out in a single layer on a baking sheet. Roast in oven for 20 minutes, tossing once during cooking.