In microwave-proof dish, stir together jelly, barbecue sauce and Worcestershire sauce. Heat on medium power for 45 seconds or until liquefied. Stir well. Alternatively, heat in small saucepan, over medium heat stirring, until liquefied.
Toss meatballs in mixture to coat. Place meatballs in 13 x 9 inch (33 x 23 cm) baking pan; bake in 400°F (200°C) oven for 16 to 18 minutes, stirring occasionally, or until nicely glazed and heated through.
Skewer onto rosemary stems, if using, or onto toothpicks.