Slice the washed and peeled carrots lengthways. Peel and finely dice the onion.
For the pesto, finely puree the garlic, washed parsley, walnuts and 2 tablespoons of oil with a magic wand. Grate and stir in the parmesan. Possibly. Add a little more stock and season.
Steam the onion cubes and carrot strips in the remaining oil for about 5 - 10 minutes. Season with salt and pepper.
Cook the pasta in salted water until al dente, mix immediately with the carrots and pesto and serve.