Microwave sweet potatoes on HIGH 7 minutes or until almost tender, turning sweet potatoes over halfway through cooking. Let stand 2 minutes. Cut sweet potatoes into wedges.
Grill ribs over indirect medium heat with lid closed 1 to 1 1/2 hours or until tender, turning occasionally. Brush with some of the BBQ Sauce during last 10 minutes of cooking. Grill sweet potatoes over medium heat 2 minutes per side or until lightly browned, brushing with remaining BBQ Sauce.