In a large pot, heat oil over medium heat.
Add garlic, onions and ginger. Cook until aromatic.
Add chicken and cook until color turns light brown.
Add fish sauce and cook for another 2 minutes.
Add rice to the pot. Stir and cook for another few minutes.
Add water and bring to a boil. Remove scum that surfaces.
Add chicken cubes and stir to dissolve.
Cover pot and lower heat to simmer. Stir occasionally.
Cook until rice has cooked and congee has thickened.
Season with salt and pepper.
Serve with green onions, toasted garlic and 1 piece calamansi per bowl.
Inspired by Kawaling Pinoy