- In a large saucepan, boil the water. Add the chopped rhubarb, and boil until the rhubarb becomes tender - a few minutes 
- Take the rhubarb and water over to your food processor, and blend it until smooth 
- Now, in the same saucepan, add the oil and saute the onion until it is tender. Again - a few minutes 
- Add the ketchup, brown sugar, syrup, vinegar, Worcestershire sauce ( who can pronounce that word?), mustard, Optional hot sauce, salt, garlic powder, smoked paprika, and your pureed rhubarb and water sauce! 
- Bring this sauce to a boil, stirring constantly, and then reduce your heat. Allow to simmer on low for about 5 minutes - uncovered 
- Allow to cool slightly, and transfer this to the food processor, and blend until the onion is all pureed 
- Transfer the sauce to some mason jars for storing and pouring, and enjoy