Soak chickpeas in a large pot of water for 24 hours.
Rinse and drain the soaked chickpeas and add to a high-speed food processor.
Add in all of the other ingredients to the food processor and blend until the falafel mixture has reached a coarse meal consistency. Add salt to taste. Place the falafel mixture into the refrigerator for at least 30 minutes.
Preheat the oven to 400 degrees Fahrenheit and line a baking sheet with parchment paper.
Remove the falafel mixture from the refrigerator and use a spoon or cookie scoop to form small, bite-sized balls. Place the falafel onto the baking sheet and brush the tops with avocado or olive oil. Bake for 20-25 minutes until crispy, flipping halfway through.
Once the falafel is done baking, serve on top of pita bread with garlic tahini sauce, pickled onions, cucumbers, herbs, harissa, and any other toppings you prefer.