Spiced bean burgers with fried eggs

Put the walnuts into a food processor and pulse until the size of rough breadcrumbs. Transfer to a mixing bowl. Pulse the onion until finely chopped. Heat ½ tbsp oil in a large nonstick frying pan and add the onion, garlic and chilli mix. Fry for 5 minutes, stirring continuously, to incorporate the spice paste, then tip into the mixing bowl.

Roughly chop the coriander and place in the bowl of the food processor with the beans. Whizz to a thick paste, then add to the bowl with the onions. Season and use your hands or a wooden spoon to combine, then divide the mixture to form 4 patties.

Roughly chop the coriander and place in the bowl of the food processor with the beans. Whizz to a thick paste, then add to the bowl with the onions. Season and use your hands or a wooden spoon to combine, then divide the mixture to form 4 patties.

Wipe the pan out again, if needed, and heat the remaining 1 tbsp oil. Crack in the eggs and fry until the whites are set and crispy on the bottom. Spread each bun with 1 tbsp soured cream, then top with a burger, another 1 tbsp soured cream, avocado, a squeeze of lime juice, the egg and the bun lid.