Cut the broccoli florets from the thick stalks, leaving an inch or two of stalk attached to the florets. Cut the larger pieces in half.
Toss the cut broccoli florets with olive oil, salt, pepper, and lemon zest. Place on a baking sheet and place in oven for 20-25 minutes until tender and tips of some are browned.
White broccoli is in oven, whisk together tahini, water, lemon juice, and honey. Drizzle tahini sauce on warm roasted broccoli before serving.