Add asparagus to saucepan of boiling water; cook 2 min. Drain. Immediately rinse with cold water until asparagus is completely cooled; set aside.
Heat large skillet on medium heat. Add onions, bacon and dressing; stir. Cook 5 min. or until onions are tender and bacon is crisp, stirring occasionally. Meanwhile, prepare stuffing as directed on package.
Stir shrimp into onion mixture in skillet; cook 5 min. or until shrimp turn pink, stirring occasionally. Add salsa; mix well. Bring to boil. Add asparagus. Reduce heat to medium-low; simmer 3 min. or until asparagus is heated through. Serve with the stuffing.