To make hummus, combine the first 8 ingredients in a blender or food processor and mix until smooth. Adjust seasonings to taste.
Meanwhile, heat olive oil over medium heat in a skillet or frying pan until hot. Add onion and cook until translucent (~5 minutes). Add zucchini and yellow squash and cook until tender (~5-10 minutes).
Before serving and if desired, microwave the tortillas for about 15-20 seconds between 2 damp paper towels.
To make the wraps, spread ¼ cup of the hummus on each warm tortilla, add ¼ of the vegetable mixture to each, roll up and serve.