I used two, 200 gram cans of kidney beans. I don't know the English measurements though. Perhaps 16 oz.?
Preheat the oven to 220 Celsius (or about 425 F).
In a food processor, roughly chop garlic and onion. Add the rest of the ingredients and blend well. I like my burgers fairly chunky so after pulsing the processor a few times, I went in with my hands and mixed the ingredients. It preserves the texture and you get dirty which makes cooking so much more fun.
Spray a bit of oil on a pan and form patties (6-8). Bake for about 10-15 minutes on each side.
Enjoy!