Preheat the oven to 375F and line a baking sheet with parchment paper.
Mix all the ingredients for the meatballs together in a large bowl. Form into 10 dinner size meatballs and set on the baking sheet making sure they have a little space in-between.
Bake for 25 - 30 minutes, or until the internal temperature has reached 165F.
While the meatballs are baking, go ahead and add olive oil to a medium saucepan over medium-low heat. Once the oil is hot go ahead and saute the garlic for 1 - 2 minutes.
Whisk in the brown sugar, pineapple juice, mustard, bbq sauce, and soy sauce. Bring to a low boil, whisk again, and turn off the heat.
Once the meatballs are ready, set them in a shallow dish or bowl and drizzle over the sweet and sour sauce. Mix together until coated and serve immediately. Sprinkle with fresh cilantro, if desired.