I kinda made it up... LOL. But I can tell you how I did it- with no measurements though, cause I'm a shake and taste kinda girl!
I did it in the slow cooker but you could do it on the stove too.
This served 4 I reckon as we're both having it for lunch today!
I fried (in frylight) up 1 huge onion with 2 peppers (chunky chopped), with 3 cloves of garlic and fresh chillies if available or we use asda's pickled Habeneros (2 teaspoons but we like it HOOOOOOT!), til soft on a low heat. Then I added 1 tin Red Kidney beans, 1 tin Cannelini beans, 1 tin of baked beans and 1/2 a tin of pinto beans. Add 1 tin of chopped tomatoes and a 250ml carton of passata. Stir and add generous amounts of cumin, oregano, black pepper, cayenne, smoked paprika and a tiny sprinkle of nutmeg and cinnamon. Splash of lee & perrins. Then leave to simmer and reduce down on a low heat.