Quick & easy lemon oil
Heat the oil in a small pan. Add the lemon zest, pour into a small, clean bottle.
Heat the oil in a pan. Sauté the onion and garlic. Add the celeriac and cook for approx. 3 mins. Pour in the water, bring to the boil, season with salt. Simmer the soup for approx. 25 mins. Add the rocket, simmer for approx. 5 mins., blend until smooth.
Stir the lemon juice into the soup, season. Plate up the soup, garnish the soup with the rocket and a little lemon oil.