Famous Japanese Restaurant-Style Salad Dressing

I thought I would try again to make the ginger dressing I love from Benihanas.  I liked the Asian Ginger-Carrot dressing I made last month, but it needed a day to mellow and it was not just like my favorite ginger dressing.  I found this on Pinterest too.  (yes I spent way too much time finding even more recipes for my to try file:)  We all liked this one too, but it was not Benihanas.  I think that I prefer this one to the other. 

Famous Japanese Restaurant-Style Salad Dressing

1/2 cup minced onion

1/2 cup peanut oil1/3 cup rice wine vinegar
2 tablespoons water
2 tablespoons minced fresh ginger root
2 tablespoons minced celery
2 tablespoons ketchup
4 teaspoons soy sauce
2 teaspoons white sugar
2 teaspoons lemon juice
1/2 teaspoon minced garlic
1/2 teaspoon salt
1/4 teaspoon ground black pepper

 In a blender, combine the minced onion, peanut oil, rice vinegar, water, ginger, celery, ketchup, soy sauce, sugar, lemon juice, garlic, salt and pepper . Blend on high speed for about 30 seconds or until all of the ingredients are well-pureed.