Make the sauce: In a saucepan, heat olive oil over medium low heat. Add red onion and cook until translucent, stirring periodically. Stir in the garlic and cook for about 1 to 2 minutes more.
Add water, vinegar, Worcestershire sauce, juice, sugar, Sriracha sauce and salt, and stir well. Bring to a boil over medium heat, then lower to a simmer. Let it simmer for about 15 minutes.
Add plums to the sauce and let it cook down until soft. Transfer sauce to a blender and blend until smooth. Pass the sauce through a sieve and return to the stove to simmer for about 5 minutes more, or until nicely thickened. Season to taste with more salt, if necessary.
Grill the egg rolls: Preheat a grill to medium or medium-low heat. Place the egg rolls on direct heat to create grill marks, then transfer to a grill pan or aluminum foil and grill on indirect heat, turning periodically, for about 8 minutes, or until crispy and the internal temperature of the egg rolls is 165°F.
Enjoy!
Recipe by Van's Kitchen at https://www.vanskitchen.com/grilled-egg-rolls-with-fruity-bbq-sauce/