Mix the beef, chili sauce and scallions together in a large bowl.
To assemble the potstickers, dip your finger in the water and line the outer edges of a wonton skin.
Put about a teaspoon of the beef filling in the center, and fold over to make a half moon shape. Press the edges together to seal. Repeat with remaining ingredients, keeping the potstickers covered with a damp cloth.
Heat the oil over medium high heat and add the potstickers. When the bottoms are golden brown, add 1/2 cup water and quickly cover.
Simmer until all the water has absorbed (maybe 5-7 minutes or so), then uncover and reduce heat to medium low for another two minutes. Remove from heat.