1. Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius).
2. Spray a frying pan with a bit of cooking spray. Sauté scallions and garlic for a minute or two. Add a bag of coleslaw mix and cook until slightly wilted. Remove from heat and add soy sauce.
3. Scoop one tablespoon of the cooled mixture onto each square wonton wrapper and fold into a triangle. Spray or brush with oil and bake until golden, about 25 minutes.
4. Combine ingredients for the dipping sauce and serve alongside wontons.