Prepare the salad. Add the cucumbers, tomatoes, olives, shallots and parsley into a mixing bowl. In a separate bowl whisk together dressing ingredients and pour over the salad. Toss to combine.
Make the tostadas. Toast the corn tortillas until golden brown and crispy. Top with a layer of hummus (I use about 2 tablespoons) and about 1/4 cup of the salad. Drizzle with tahini and enjoy!
Video
Notes
* you might have to add some water to the tahini to make it a pourable/dressing consistency