1. Place the chickpeas, tahini paste, olive oil, water, garlic, lemon juice, yogurt, cumin powder, and black pepper into a blender/food processor and blend till smooth, reserve in chiller till needed.
2. To make the tortilla chips, preheat oven to 320˚F (160˚C), lightly oil a baking tray and lay the tortilla wedges evenly onto the greased tray. Bake in the oven for 15 minutes or till crispy and golden brown.
3. Leave to cool completely. Serve the chilled hummus with tortilla chips and vegetable sticks (carrot sticks, cucumber sticks, celery sticks)