Heat oven to 200C/180C fan/gas 6 and line two baking sheets with baking parchment. Tip the chickpeas, ground cumin, ground coriander, the cayenne pepper, onion, garlic, sesame seeds, baking powder, parsley stalks and 1 tbsp water into a food processor. Blitz until combined but not smooth (you want the falafel to have some texture, rather than being the consistency of hummus).

Season to taste, then roll into 18 evenly sized balls. Flatten each ball into a disc shape and arrange on the baking sheets, then brush the tops with 1 tbsp of the oil. Bake for 20 mins until golden and crisp, turning halfway through cooking.