Preheat the oven to 400°F (200°C). Rinse and drain 1 can chickpeas very well so the patties hold together.
In a food processor, add ¾ cup parsley, 1 yellow onion, and 2 cloves garlic. Pulse until finely chopped.
Add chickpeas, 1 teaspoon coriander, 1 teaspoon smoked paprika, ½ teaspoon cumin, 1 teaspoon salt, and pepper, then pulse again in short bursts until the mixture is crumbly (not smooth). It should stick together when you press it.
Move the mixture to a bowl. Add ½ cup all-purpose flour and ½ teaspoon baking powder. Mix well with a spoon or your hands until it forms a thick, easy-to-shape dough.
Line a baking tray with parchment paper and lightly brush with oil. Shape the mixture into 4 patties and place them on the tray. Brush the tops with a little oil.
Bake for 15–18 minutes at 400°F (200°C), until firm.
For extra crispiness, heat a little oil in a pan over medium-high heat. Cook the patties for 1–2 minutes per side until golden.
Serve in a bun with toppings like lettuce, tomato, onion, and yogurt tahini sauce.
