Drain all the liquid from the beans. Pulse cheese and beans in a food processor until they are chopped into small pieces, but not until they are mush.
Cook the chopped onion in the butter until soft. Add to the cheese and bean mixture in a bowl. After the onions have cooled slightly, add the rest of the ingredients and mix them together well.
Mold into a roll or loaf, or pack into a loaf pan. Brush with melted butter and sprinkle or roll in more breadcrumbs
Bake at 375 degrees for 25 minutes or until well browned and the cheese has melted. Serve with your choice of sauce.