Wrap the beetroot individually in foil and bake for 1 ½ hours until tender.
Allow to cool.
Meanwhile, gently fry the onion over a low heat for 10-15 minutes until soft and beginning to colour.
Add the garlic and spices and cook for a further minutes until fragrant, remove from the heat.
Add the aduki beans and roughly crush with a fork, add the sundried tomatoes, lemon and mint.
Remove the skin from the roasted beetroot and grate on the coarse side of a grater. Add to the crushed beans and mix through with the fork.
Mix well, then taste and check for seasoning, adding salt and pepper.
Stir in the ground oats.
Divide the burger mix into six portions. Rub a little oil on the palms of your hands and form each one into a patty, not more than 2cm thick.
Place onto a lightly oiled plate or tray, chill for an hour to firm up.
To cook the burgers, place on an oiled baking tray and brush the tops with a little oil. Bake for 15-20 minutes in a hot oven (200°C fan) until crispy on the outside turning them over halfway. You could also shallow fry in a frying pan.
Notes
Nutritional information is approximate and is intended as a guide only.