With the food processor running on high, alternate adding in tahini and 1 ¼ cup of ice cold water. Continue to blend until the mixture is thick and creamy. It should resemble the texture of buttercream.
Divide hummus into three separate bowls, and top with 1 tablespoon of olive oil on each bowl. Garnish each hummus with the toppings listed below. Place hummus, pita, and raw vegetables on a serving platter.