In a large pan, add olive oil over medium heat.
Once heated, saute onions for a couple of minutes until lightly golden and translucent in appearance
Reduce heat to low and simmer until cooked through, 8 to 10 minutes.
Cook on low heat while stirring for a minute
Now, add tomatoes; cook for three minutes or until the tomatoes are soft and mushy
Next, stir in beans, corn kernels, stock and salt; cover the githeri mixture and reduce heat to low-medium
Simmer for about 8 minutes, stirring occasionally
Garnish githeri with spring onion (scallion) and cilantro