In 10-inch nonstick skillet, cook pancetta over medium-high heat 7 to 9 minutes, stirring frequently, until crispy. Remove pancetta with slotted spoon to small bowl. Discard all but 1 tablespoon drippings; return skillet to heat, and reduce to medium. Add onion and garlic. Cook 3 to 4 minutes, stirring occasionally, until tender. Add onion mixture to pancetta; set aside.