Shouldn’t have thought so not used those beans before, but I’d imagine it’s just a case of cooking enough flavour (stock, herbs and maybe some spice, deoending) into the beans with your basic veg like onions garlic carrots etc then topping with mash. Maybe add flour to make a thicker gravy with the beans and an egg yolk to the mash, can’t remember why, but it’s good. Oooh and mustard in the mash too.