Preheat smoker to 350 degrees according to instructions. Allow to sit at the temperature for a few minutes before adding the meatballs to the grill.
To make the meatballs: in a large shallow bowl, combine ground beef, cilantro, chives, breadcrumbs, egg, garlic paste, mustard, and salt and pepper to season.
Shape into 2 oz meatballs and place directly on the grill. Cook for 35 minutes.
BBQ sauce: In a medium sized bowl, combine the dijon, sugar, vinegar, onion powder, garlic, paprika, celery seed, sesame oil, cornstarch and water. whisk until smooth. Heat a medium sized saucepan over medium heat and add the mixture. Stir in the minced onion and cook until slightly thickened about 6 minutes. Once the mixture has thickened a bit, stir in the tomato sauce, paste, ketchup, molasses, and Worcestershire. Bring to a gentle simmer and stir occasionally. Season with salt and pepper to taste. Cook 10 minutes and let cool. For a smoother sauce blend until smooth.
Once the meatballs have cooked, transfer to a deep baking dish with the BBQ sauce and return to the smoker to cook for 15-20 minutes until the meatballs are fully cooked through.
To serve: spoon meatballs overtop rice with some of the BBQ sauce, top with pico de gallo and finish with chipotle aioli.
Notes
Pico de gallo: combine diced tomato with minced white onion, chopped cilantro, lime juice and season with salt.