Ingredients:

• 3 tbsp canola oil;
• 1/4 cup finely chopped red onion;
• 3 cloves garlic, minced;
• 1-inch piece fresh ginger, peeled and minced;
• 1 tsp red chile flakes;
• 1 pound ripe prune plums;
• 1/4 cup soy sauce;
• 2 tbsp chinese black vinegar or rice vinegar

Method: Slice plums in half and discard pits. Cut each half into about 6 chunks.  Heat oil over high heat in a wok or skillet until glistening. Fry the onions until they start to turn golden around the edges, about 1 minute. Add the garlic, ginger and chile flakes and fry for 30 seconds, stirring often. Toss in the plums, soy sauce and vinegar. Mix until everything is incorporated and bubbling, turn down the heat and simmer on medium for 20 minutes, stirring occasionally, until plums fall apart completely. Let cool. Whirl sauce in a blender. Add water to thin until it reaches a ketchup-like consistency.