In a medium pot, bring chicken broth and salt to a boil over high heat. Stir in rice and bring to a simmer. Add the lid to the pot and reduce heat to low. Let rice simmer for 20 minutes and then remove pot from heat and let rice sit another 10 minutes in the pot.While rice is cooking, make the tahini dressing. Add garlic, tahini, hot water, red wine vinegar and olive oil to the jar of a blender and puree on high until smooth. Season to taste with kosher salt.Transfer cooked rice to a large bowl. Add broccoli, chicken, garbanzo beans, cooked peas, cherry tomatoes and shallot and herbs. Toss well to combine and transfer to a serving platter or to individual bowls. Drizzle with tahini dressing and sprinkle with chives.