Chop up the peeled and deveined shrimp into small bite-sized pieces. Put into a bowl with 1/2 tsp baking soda (or 1 tsp of cornstarch) and a pinch of salt. Mix well -- if it's really dry, add a few drops of water. Set aside and let marinade. The cornstarch will help the shrimp stay snappy and bouncy.
4 oz shrimp, 1/2 tsp baking soda, 1/2 tsp salt
Finely dice the bamboo shoots and the pearl onions or shallots. Slice 2 stalks of scallions thinly, and keep the whites and greens separate. The whites will be for the wonton filling, and the green will be garnish for the soup. Set aside.
2-3 pearl onions, 1/4 cup bamboo shoots, 2-3 stalks scallions
Mince the pork shoulder (butt) by first slicing the meat into thin, flat steaks. Then, slice those steaks into long strips. Turn the strips 90 degrees so that they're perpendicular to your knife, then slice into small cubes. Once they're small cubes, you can use a large cleaver or knife to continue chopping until they're minced. While mincing, you'll want to pause and occasionally fold the meat over itself to get a sticky, bouncy texture. See the video above for a quick tutorial and to see what the end result should look like. Set aside in a mixing bowl.
8 oz pork shoulder (butt) with fat marbling
Once the shiitake mushrooms are completely rehydrated (you can test by squeezing -- there should be no hardness to them), squeeze out the liquid, remove the tough middle stems, and finely dice. Save the aromatic water for the filling.
Heat up a pan to medium heat with no oil and toast the dried baby shrimp until they're fragrant and slightly brittle. Remove and set aside. Add 1 tbsp neutral oil, diced mushrooms, pearl onions or shallots, and a pinch of salt. Saute until they're slightly caramelized (about 3-4 minutes). Remove from the pan.
3-4 dried shiitake mushrooms, 1/4 cup dried baby shrimp, 2 tbsp neutral oil, 2-3 pearl onions
In a mortar and pestle or spice grinder, grind the dried baby shrimp into a powder. If you don't have either of these tools, you can try a rolling pin, or chop them up really finely.