Ingredients:

1 small onion, finely chopped

110ml/4 fl oz peanut oil

75ml/2½ fl oz rice vinegar

2 tbsp water

2 tbsp fresh grated ginger

2 tbsp finely chopped celery

2 tbsp ketchup

4 tsp soy sauce

2 tsp sugar

2 tsp lemon juice

1/2 tsp crushed garlic

1/2 tsp salt

1/4 tsp black pepper

Method:

Combine all ingredients in a blender. Blend on a high speed for about 30 seconds or until everything is well pureed.