Preheat oven to 325 degrees F. Line a baking sheet with parchment paper.
Drain and rinse the chickpeas. Place on a baking sheet in a single layer and pat well with a paper towel to remove excess moisture.
Bake for 15-20 minutes. This will help dry out the chickpeas and prevent the falafels from being too mushy.
Adjust the oven to 400 degrees F.
Combine the chickpeas, onion, garlic, cilantro, parsley, lemon juice, cumin, coriander, and salt in a food processor until combined. Add the tahini. Blend again until chickpeas have fully broken down and the mixture binds together.*
Using your hands, form the chickpea mixture into balls and then flatten them into small patties. Mixture should form about 20 falafels. Place them evenly spaced on the baking sheet.
Bake for 30-40 minutes or until lightly browned. Serve warm.