Preheat the oven to 200°C (Gas Mark 6 / 400°F).
Add all the burger ingredients (everything except the spray oil) to a food processor, and blitz until the nuts and coriander are all chopped well, and the mixture has reached your desired consistency. Try not to over-process - it’s nice if some parts are left a bit chunkier than others (you can hold back a few pumpkin seeds to add whole, if you prefer).
With clean hands, separate the mixture into six equal portions, and form each into a thick burger shape. Place on a lightly greased lined baking sheet, and spray lightly with oil. Bake for 20-25 minutes until crispy, and serve warm.