Beancurd in Blackbean Sauce

1/2-1 bìa đậu hũ (1/2-1 box of beancurd)
2 tablespoon tương đen (2 tablespoons of blackbean sauce)
2 tablespoon đường (2 tablespoons of sugar)
1 củ hành (1 onion thinly sliced)

Some oil, add onion, then blackbean sauce, sugar some water and simmer..then float the beancurd in, be gentle or else they will break..simmer for 5 minuted and it should be ready.