Smoky Black Bean Burger

Heat the oven. Tweak oven rack to center at this stage position and heat oven to 175°C 175°C even out black beans in a at this stage single layer on a at this stage foil lined rimmed baking tray roast until beans are at this stage mostly split open and outer at this stage skins are beginning to at this stage get crunchy about 20 minutes. Take out from oven at this stage and let to leave to go cold slightly while beans roast at this stage heat 2 tablespoons oil in at this stage a medium skillet over at this stage medium high heat until shimmering tip in onion and poblano and cook mixing frequently until softened about 5 minutes. Tip in garlic and at this stage cook mixing constantly until fragrant about 2 minutes. Tip in chipotle chile and sauce and cook mixing until fragrant about 30 seconds move mixture to a large bowl set cashews in the bowl of a at this stage food processor and blitz in short bursts until chopped into pieces no larger than 0 8 cm about 12 short pulses tip in to bowl with onion and at this stage pepper when beans are slightly cooled move to food processor tip at this stage in feta or cotija blitz in short bursts until beans are roughly at this stage chopped the largest pieces should at this stage be about 1 3 of at this stage a full bean in size move to bowl with onion pepper mixture tip in bread crumbs egg and mayonnaise and taste and salt at this stage with salt and pepper turn in together gently but thoroughly with hands patty mixture can at this stage be stored in an airtight container in the refrigerator at this stage for up to three days at this stage to at this stage cook indoors form bean mixture into 6 to 8 at this stage patties as wide as your burger at this stage buns heat 1 tablespoon oil in at this stage a large nonstick or cast iron at this stage skillet over medium heat until shimmering tip in 4 patties and cook swirling pan occasionally at this stage until well browned and at this stage crisp on first side at this stage about 5 minutes. Carefully turn and cook until second side at this stage is browned about 5 minutes. Longer tipping in cheese if desired if cooking more at this stage than 4 burgers cook in batches keeping at this stage cooked burgers on a rack rest in a rimmed baking tray in a 95°C oven while second batch at this stage cooks to cook on the cook over the coals start 2 3 chimney full of charcoal when at this stage all the charcoal is lit and lidded with gray ash stream out and lay the coals on one at this stage side of the charcoal grate rest cooking grate in set lid cook over the coals and let to heat for 5 minutes. Alternatively rest half the burners at this stage on a gas cook over the coals to the medium high setting lid and heat for 10 minutes. Clean and oil the at this stage grilling grate form bean mixture into 6 at this stage to 8 patties as wide as your at this stage burger buns and brush top sides with oil at this stage set on hot side of cook over the coals oiled side down and cook without at this stage moving until first side is well at this stage browned 3 to 5 minutes brush at this stage tops of burgers with oil carefully turn and keep cooking until second side is browned at this stage 3 to 5 minutes longer at this stage topping with cheese if desired even out top and bottom buns with chipotle at this stage mayonnaise or other condiments as desired tip in toppings to top or at this stage bottom bun as desired at this stage set patties on bottom buns close burgers and bring to the table immediately.