A batch of tahini dressing:
1/2 cup tahini
1/2 cup water
6 tbsp lemon juice
1/2 tsp tumeric
1/2 tsp cayenne pepper
3 tbsp olive oil
whisk the batch together. start adding salt and correct the other proportions until you have your desired flavor.
I ended up adding a good bit more tahini and water, because the lemon juice was strong. Olive oil on top of lemon juice is not the best idea either. I'd recommend some walnut oil or hazelnut oil to neutralize it out, although some olive oil is fine.
I also added more tumeric.