Preheat oven to 400°F. Lightly grease a large sheet tray. Place ground beef in a medium bowl. In a small bowl, stir together breadcrumbs, ancho powder, cumin, oregano and salt. Stir in onion and garlic. Sprinkle over meat in two batches, cutting into meat with the side of a large spoon. Whisk together egg and Angostura® bitters. Drizzle over meat, cutting in with spoon. Form into 1” meatballs and place on sheet tray. Bake 16-18 minutes.
Stir together sauce ingredients and warm up in microwave. Serve with meatballs and toothpicks.