In a food processor, finely chop the onion, cilantro and serrano pepper. should look like a thick slightly chunky paste.
In a bowl, add all the kabab ingredients together and mix well. Let rest for 15 mins
Using the stick end of a wooden spoon (the rounded kind) as guide, form into 4-5 inch long sausage like shape. slide off and keep aside while forming the rest. You should be able to get roughly 25 kababs.
Grill the kababs. 3-4 minutes per side. Alternatively, pan fry the kababs on the stove top with just a little drizzle of oil. Make sure to use a hot pan to get a nice color and crusty sear on the kabab.