Heat the olive oil in a frying pan over medium heat. Cook the onion, garlic and chilli until soft. Transfer to a plate and place into the fridge to cool.

In a large bowl, mix the lentils, cooled onion mixture, beetroot, egg, turmeric, garam masala, paprika and ginger until combined. Season with salt and pepper, then sprinkle in the flour (or cornmeal or almond meal) one tbsp at a time, until the mixture is dry and firm enough to hold together. Shape mixture into 6 individual patties.

Place onto a tray and chill in the fridge for 10 minutes to firm up. Heat the extra olive oil in a large non-stick frying pan over medium heat. Add the lentil patties and cook for 5–6 minutes each side, until caramelised and heated through.

Lay out all the remaining ingredients on a large chopping board with the warm patties and let people construct their own burgers. Season with salt and pepper.