Preheat the oven to 400° F and place frozen vegan meatballs on a baking sheet (or make homemade vegan meatballs.)
Place the meatballs in the oven for 15 minutes until heated all the way through. (or follow package or recipe directions)
Make the sauce
While the vegan meatballs are baking, cook 3 cloves of minced garlic and 1 diced red bell pepper in 1 tablespoon of oil over medium-low heat for about 3-4 minutes, then add 1 cup of cubed pineapple and cook for an additional 2-3 minutes stirring frequently.
Mix all of the sauce ingredients together in a large measuring container or bowl and pour it into the hot skillet with the peppers and pineapple. Stir continuously until the sauce thickens and gets shiny.
Add the meatballs
Turn the heat to low then add the baked vegan meatballs to the sauce and carefully stir so that you don't break the balls.
Place toothpicks in the vegan meatballs so your guests can easily eat them and serve them hot. You can also serve them over rice or rice noodles for a meal.
Notes
Heat the garlic in the oil over medium-low heat and be careful not to burn the garlic.
You can also serve these sweet and sour meatballs in a crockpot set on warm to keep them hot throughout your party.