Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or silicone baking mat.
Drain and rinse the chickpeas thoroughly, saving the liquid from the can, known as aquafaba.
In a food processor, add the chickpeas and pulse until finely chopped and crumbly. It's important to avoid overblending as it can result in losing the desired texture of the preparation.
Combine the processed chickpeas, oat flour (or chickpea flour), baking powder, paprika, garlic powder, onion powder, salt, and pepper in a bowl. Add 4 to 6 tablespoons of the reserved aquafaba. Then, mix the ingredients until you reach a consistency that allows you to shape the nuggets easily.
Prepare a small bowl with the rest of the aquafaba.
Place the crumb topping ingredients in a separate bowl and mix them up.
Now, it's time to shape your chickpea nuggets. Scoop up a spoonful of the chickpea batter and shape it into nugget-sized pieces using your hands. Dip each nugget into the aquafaba and roll each in the crumb mixture, ensuring they're evenly coated*. Place the coated nuggets on the prepared baking sheet.
Repeat this process until all the chickpea mixture is used and you have a tray full of chickpea nuggets.
Bake in the preheated oven for 25-30 minutes, turning the nuggets over halfway through baking to ensure they cook evenly. They should become slightly golden brown and crispy on the outside.
Once the chickpea nuggets are cooked to your liking, remove them from the oven and let them cool for a few minutes before serving.
Serve your oil-free vegan chickpea nuggets with your favorite dipping sauces, such as ketchup, barbecue sauce, or a vegan ranch dressing. Enjoy!