Soak beancurd sticks for 30 minutes. Drain and cut into bite size pieces.
Carefully peel of the membrane on the bone side of the ribs. Then cut into small pieces.
Heat vegetable oil in a clay pot. Add ginger, garlic, fermented black beans, and chili paste. Stir fry for 2 minutes.
Add lamb ribs and toss to get it coated with sauce ingredients. This should take about 2 minutes.
Pour in water. Bring it to a boil. Cover pot with lid, reduce heat, and allow it to simmer for 1½ hours. Every now and then open the lid and skim off excessive fat.
Add prepared beancurd sticks to the pot. Continue to simmer for another 30 minutes.
Pour in cornstarch mixture. Continue to simmer for 1 to 2 minutes until sauce thickens.