In a small bowl mix together the cornstarch and water. Set aside.
In a small saucepan heat the oil over medium heat and whisk in the tomato paste. Cook on low for 3-4 minutes.
Add the sugar, vinegar and soy sauce. Whisk to combine and cook another 3 minutes.
Stir the cornstarch slurry and slowly whisk into the saucepan. Cook for another 2-3 minutes and sauce has thickened (See Note 1). Add a tablespoon of water if a thinner sauce is preferred. Season to taste with more or less vinegar for a tarter flavored sauce or add a tablespoon of sugar for a sweeter.
Notes
If any oil separates or if there are any lumps due to cornstarch, blitz using an immersion blender to smooth consistency.
Nutrition based on 1/4 cup serving, this makes 2 cups total.
For Fried Wonton Strips-1 package wonton wrappers -vegetable canola, or peanut oilCut wrappers into strips about 3/4-inch strips. Heat about 1-inch of oil in a deep skillet or Dutch oven. Heat oil to 350-360°F. Fry in batches, spreading them out so they don't stick. Remove with a slotted spoon when they turn golden brown.Drain on paper towel-lined plate.