Ginger Soy Sauce Salad Dressing

this salad dressing alone is a great motivator for me to actually eat some salad ! i love it.

• 15g ginger root
• 1/4 onion (or more)
• 180ml vegetable oil
• 60ml vineager
• 120ml soy sauce
• 1/8 lemon, juice
• 1 table spoon garlic
• (2tbsp ketchup/tomatoe purree
• 1tbsp mustard
• 2tbsp tahini or sesame seeds)