Peel the celery and cut into sticks. Peel the carrots and cut them into sticks as well.
Fry the celery and carrots in the hot oil, add the chilli and deglaze with the stock. Add the peas and let everything simmer for about 5 - 8 minutes. Remove the pan from the heat and let the vegetables cool down.
For the dressing, whisk all the ingredients together well. Add the dressing and onions to the vegetables and mix everything well. Fold in the chives.