Chop up 2 onions and a few garlic cloves and 1-2 stalks of celery.
Sauté in water for a few mins to soften.
Add low salt vegetable boullion - I always make it much weaker than the tub suggests to minimise salt
Let that boil for a few mins while you add your flavourings. For spinach soup I like mixed herbs, ground nutmeg, seaweed, onion powder, celery seeds, but all are optional.
Add the spinach and cook until just wilted - don't overcook or it will lose its colour.
Whizz it all up in a blender.
Taste and adjust flavourings & add Nutritional Yeast, whizz again.
Drizzle in some natural soya yoghurt.