Drain and rinse the beans, mash in a mixing bowl. Can leave a few half beans for texture but no whole beans. Add all other ingredients (chopped cilantro, chopped onion, minced garlic) and mix with fork and then knead with hands until firm and uniform.
Divide into patties. Recipe states it makes six, I get eight smaller ones.
Heat heavy skillet with small amount of oil and cook 5 minutes on each side.