Before we move further I think I need to explain what guisa/gisa/guisado is. It is the Filipino cooking style of sauteing garlic, onion, and/or tomato in oil to form the base of a lot of its dishes. I say "and/or tomato" as it is sometimes not required. Ginger, lemongrass, and chillies are also added to vary the base but most if not 100% of the time garlic and onions are present.
I couldn't help but compare this with the Subcontinent's dal/dahl/dhal. The name refers to both the pulse (dried lentils, peas or beans) and the cooked pulse dish which has very similar qualities to the monggo guisado. With that in mind I use the Indian cooking technique called chaunk or tarka (please follow the link for a detailed explanation) to differentiate my version from the rest. It's more for convenience rather than radical innovation on my part that is why I chose to do it this way.
Mung bean is tough and needs to be boiled in water before it can be used. rather than taking out another large pot to cook my soup I keep the softened mung bean in its original pot and make my Pinoy version of the tarka (sauteed garlic, onion and tomato) in a small frying pan instead. I then pour it in the same pot to simmer for a few more minutes.
I add some home made chicharon and chilli leaves as final touches to this much loved soup.