Whisk until smooth. You may need to add more water to get to a saucy consistency.
Make the Green Beans:
Heat 2T of olive oil in a pan over medium heat.
Add half of the green beans and saute' until brown, blistered, and wrinkled in spots.About 6 minutes.
Add garlic and continue to saute' until lightly brown.
Add half of the rosemary and parsley, along with a touch of salt to combine.
Transfer to a platter and then repeat with the rest of the green beans.
Drizzle the green beans with the dressing. Grate some lemon zest over the top.
Notes
Store the green beans in an airtight container in the refrigerator. They will last for 2-3 days.Reheat either in the microwave for 30-60 seconds or in a pan.If the green beans are stored without the tahini dressing on them already, reheat them in the oven at a low temperature for 10 minutes. Add the dressing on top and serve.While you can freeze the blistered green beans without the dressing, I do not recommend it.