Tau Yew Bak/Pork in soy sauce

Had some pork tenderloin in the fridge, and made this simple dish for the kids. It's a home recipe that my girlfriend in Singapore used to make and I estimated the quantity of the ingredients. Usually cookied with tofu and hard-boiled eggs in the soy sauce mixture, and I did everything in the slow-cooker. 5 hours later and it's ready. It's a little salty, so I'll probably decrease the soy sauce. But great with rice, and the kids loved it.

1/4 c. thick, dark soy sauce
2 c. water
1 whole garlic, unpeeled
1 tsp five-spice powder
Soya sauce
White pepper
Black pepper
1 1/2 lb. pork tenderloin, cut into quarters
eggs (optional)
firm tofu (optional)

Place everything into slow-cooker, and cook for 3-4 hours on high. Add whole eggs about 30mins to 1 hour before serving.
Serve with rice.