Remove the lengthwise threads from the celery stalks and cut into fine slices. Wash and finely chop the celery greens.
Heat the oil in a saucepan and allow the onions to become translucent. Add the celery stalks, fill with stock and simmer for 5 minutes. Then add the leafy greens and let simmer for another 5 minutes.
Stir in 1 tablespoon of yeast flakes and 1 tablespoon of almond butter as a soup. If you eat the whole thing as a vegetable, then take 2 tablespoons at a time, then the liquid thickens. Salt and pepper to taste.