Preheat Oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it.
Mix Meatball Ingredients: In a large bowl, combine the ground beef, breadcrumbs, Parmesan cheese, chopped onion, minced garlic, egg, salt, black pepper, Worcestershire sauce, and oregano. Mix until just combined; avoid overmixing.
Form Meatballs: Shape the mixture into small meatballs, about 1 inch in diameter, and place them on the prepared baking sheet.
Bake Meatballs: Bake in the preheated oven for 20-25 minutes, or until cooked through and browned.
Prepare the Whiskey Peach BBQ Sauce:
Mix Sauce Ingredients: In a saucepan over medium heat, combine the peach preserves, whiskey, barbecue sauce, Dijon mustard, apple cider vinegar, and smoked paprika. Stir well and bring to a simmer.
Simmer: Reduce the heat to low and let the sauce simmer for about 5-10 minutes, stirring occasionally, until slightly thickened.
Combine and Serve:
Combine Meatballs and Sauce: Once the meatballs are cooked, remove them from the oven and place them in the saucepan with the whiskey peach BBQ sauce. Toss to coat the meatballs in the sauce.
Serve: Transfer the meatballs to a serving dish and serve warm. They can be garnished with chopped green onions or fresh parsley if desired.