1. In a food processor, combine chickpeas, onion, garlic, parsley, cumin, coriander, salt, baking powder, and flour. Process until well combined but not pureed.
2. Form the mixture into small patties or balls.
3. Heat olive oil in a frying pan over medium heat. Fry the falafel patties until golden brown on both sides, about 3-4 minutes per side.
4. Warm the tortillas in a dry pan or microwave.
5. Assemble the wraps by placing a few falafel patties on each tortilla, then topping with lettuce, tomatoes, cucumber, and a drizzle of tahini sauce.
6. Roll up the tortillas and serve immediately.