1/2 c. oil
1/4 c. soy sauce
3 tbsp. and 1 tsp. vinegar
2 tsp. sugar
1/2 tsp. ketchup
1/4 tsp. pepper
1/3 c. chopped onion
1/4 c. chopped celery
2 tbsp. grated ginger root (peel skin off before grating)

Place ingredients in blender. Blend until smooth.