Stir in the rest of the black beans - leaving some whole gives texture to your burger.
If your mixture is too wet - add a spoonful or so of jumbo oats then leave them to soak up the excess moisture for a few mins.
Form 4x equal balls then squash down into flat burger shapes with your hands.
Gently fry each burger for 1 min on both sides in a little oil to seal them before they go in the oven.
Pop in the oven for 15 mins.
Serve in a burger bun with all your favourite extras!