Never used a recipe for burger patties, but for my daughters, here is a guide for ours : blend one onion and a slice of bread or breadcrumbs  (red onion is best) on speed 7 for a few seconds until finely chopped, add a tray of mince (450-500g),an egg,  some tomato paste, Worcester sauce, salt and pepper. Blend on reverse speed 3 for a few seconds until combined. Test the taste by frying a tsp size patty. Shape into burger patties and pan fry a few minutes each side.

Found some similar recipes on the recipe community :-

http://www.recipecommunity.com.au/main-dishes-meat-recipes/rissoleshamburger-patties/57394

http://www.recipecommunity.com.au/main-dishes-meat-recipes/hamburgers/82665