Soak your shitake mushrooms in boiling water and let them soak for 30 minutes covered. Reserve the mushroom stock for later.
2 dried shitake mushrooms
Cut your pork shoulder into a 250g piece. Separate the 250g piece into smaller strips to make it easier to dice.
250 g pork shoulder
Give our pork shoulder a really fine dice and it should almost look like ground pork after you are finished.
Rinse with cold water to get rid of the myoglobin.
Strain and dry with a paper towel. Add it to a mixing bowl.
Peel and devein your shrimp then give them a fine chop as well. They should look like minced shrimp. Add the shrimp into your mixing bowl.
100 g shrimp
Take your soaked shitake mushrooms and give them a fine dice. Add them to the bowl along with some of your mushroom stock.
2 dried shitake mushrooms
Season with white pepper, soy sauce, oyster sauce, sugar, chicken bouillon, and corn starch.
1 tsp white pepper, 1 tbsp soy sauce, 1.5 tbsp mushroom stock, 1 tbsp oyster sauce, 1 tsp sugar, 1 tsp chicken bouillon powder, 1 tsp corn starch
Mix until combined then pick up the filling and slap it back into the bowl 15 times. This is called "dat" and it is what gives the meat a springy texture.
Take your wonton wrappers and cut off the corners. This will remove excess that we don't need.
square wonton wrappers
Using a knife, place 1 tbsp of filling into the center of the wrapper, then continue pressing down while twisting the wrapper. As you turn, shape them into a circle and "siu mai" like shape.
Top each siu mai with masago then steam for 10 minutes.
masago
You can also freeze these and steam at anytime for 15 minutes.