Tahini and celery soup

This is one of my all time favourite soups. It's great hot or cold and is packed with veggies.

Ingredients

2 leeks chopped
A head of celery chopped
4 or 5 spring onions chopped
A tablespoon soy sauce
2 tablespoons tahini
1 tablespoon butter
1 teaspoon olive oil
Juice of one lime
Salt and pepper to taste
2 cups vegetable stock
Paprika and dill to serve

Fry the leeks in the butter for 2 minutes
Add the celery.
Fry for one more minute
Add the spring onions
Fry for one more minute
Add the soy sauce and stir.
Add the salt and pepper.
Add the tahini and stir.
Slowly add the stock, one spoonful at a time, stirring all the time.

Don't worry if it curdles a little, it'll sort out in the blender.
Once cooked, add the olive oil and lime juice.
Blitz briefly with a hand blender, leaving plenty of chunks.
Serve with paprika and dill.