Add 450 grams shrimp (peeled and deveined) to a bowl and sprinkle on the 1 teaspoon baking soda and ½ teaspoon salt. Drizzle in a few tablespoons of water and mix it together to ensure the baking soda is evenly distributed. Cover and refrigerate while you prepare and measure out the other ingredients.
450 grams shrimp, 1 teaspoon baking soda, ½ teaspoon salt
When you're done with the other prep, wash the shrimp in cold water until the water is crystal clear.
Drain the shrimp and pat them dry with several layers of paper towels.
Transfer the shrimp to a bowl, dust them with 2 teaspoons potato starch, and toss them to give each one a thin, even starch coating.
2 teaspoons potato starch
Heat 3 tablespoons vegetable oil in a large frying pan over medium-high heat and the shrimp in a single layer.
3 tablespoons vegetable oil
As the shrimp turn orange around the edges, flip them over quickly.
Once the shrimp are mostly cooked through, remove them from the pan, leaving behind as much oil as possible.
Add 10 grams garlic, 10 grams ginger, and 60 grams scallion stems and stir-fry until the garlic no longer smells raw.
10 grams garlic, 10 grams ginger, 60 grams scallion stems
Add 2 tablespoons doubanjiang and continue stir-frying until you have a thick paste.
2 tablespoons doubanjiang
To make the sweet chili sauce, pour in ⅓ cup ketchup and ⅓ cup sake, and return the shrimp to the pan. Stir-fry until the shrimp are fully cooked, and the sauce forms a thick glaze.
⅓ cup ketchup, ⅓ cup sake
Finish the Chili Shrimp by drizzling over 1 tablespoon rice vinegar and tossing it before plating it. Garnish with chopped scallions greens.
1 tablespoon rice vinegar, scallions greens