Drain Beanz using a small colander (better than a sieve as it drains better), reserving the juice!
Fry the onion and garlic in 1 tbsp olive oil until translucent. Cool.
Add onion and garlic to a bowl with the Beanz, coriander, spices, salt, breadcrumbs, chilli. Mix lightly but confidently with a wooden spoon until the mix comes together in a homogenous mass. Leave some texture in the mix - a few whole Beanz is good. At this point, get your hands in to mold the patties. Form into 6 patties, then pop in the fridge to sit briefly.
Fry the patties over medium heat - you don’t want to sear these over high heat! It’s good to dehydrate the exterior of the patties- for a crust/crunch. Watch it doesn’t burn, there are sugars from the Heinz tomato sauce involved in the mix.
Add the drained juice to a small saucepan and reduce over medium heat until thick. Stir through Heinz ketchup and set aside to cool.
Mix the Heinz mayonnaise with the sour cream and lime juice. These are your 2 sauces.
Build your burger - bottom toasted bun, ketchup sauce, lettuce, burger, sour cream, top bun.